matiec: comparison stage1

equal deleted inserted replaced

-:fff75b8283be
+:0e43c556cd2d
 */
 /* ERROR_CHECK_BEGIN */
 | integer_type_name signed_integer
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between integer type name and value in integer literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between integer type name and value in integer literal.");
 	}
 | integer_type_name binary_integer
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between integer type name and value in integer literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between integer type name and value in integer literal.");
 	}
 | integer_type_name octal_integer
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between integer type name and value in integer literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between integer type name and value in integer literal.");
 	}
 | integer_type_name hex_integer
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between integer type name and value in integer literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between integer type name and value in integer literal.");
 	}
 | integer_type_name error signed_integer
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between integer type name and value in integer literal.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between integer type name and value in integer literal.");
 	 yyerrok;
 	}
 | integer_type_name error binary_integer
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between integer type name and value in integer literal.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between integer type name and value in integer literal.");
 	 yyerrok;
 	}
 | integer_type_name error octal_integer
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between integer type name and value in integer literal.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between integer type name and value in integer literal.");
 	 yyerrok;
 	}
 | integer_type_name error hex_integer
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between integer type name and value in integer literal.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between integer type name and value in integer literal.");
 	 yyerrok;
 	}
 | integer_type_name '#' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for integer literal.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for integer literal.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new real_literal_c($1, $3, locf(@1), locl(@3));}
 /* ERROR_CHECK_BEGIN */
 | real_type_name signed_real
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between real type name and value in real literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between real type name and value in real literal.");
 	}
 | real_type_name error signed_real
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between real type name and value in real literal.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between real type name and value in real literal.");
 	 yyerrok;
 	}
 | real_type_name '#' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for real literal.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for real literal.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 */
 /* ERROR_CHECK_BEGIN */
 | bit_string_type_name integer
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between bit string type name and value in bit string literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between bit string type name and value in bit string literal.");
 	}
 | bit_string_type_name binary_integer
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between bit string type name and value in bit string literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between bit string type name and value in bit string literal.");
 	}
 | bit_string_type_name octal_integer
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between bit string type name and value in bit string literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between bit string type name and value in bit string literal.");
 	}
 | bit_string_type_name hex_integer
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between bit string type name and value in bit string literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between bit string type name and value in bit string literal.");
 	}
 | bit_string_type_name error integer
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between bit string type name and value in bit string literal.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between bit string type name and value in bit string literal.");
 	 yyerrok;
 	}
 | bit_string_type_name error binary_integer
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between bit string type name and value in bit string literal.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between bit string type name and value in bit string literal.");
 	 yyerrok;
 	}
 | bit_string_type_name error octal_integer
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between bit string type name and value in bit string literal.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between bit string type name and value in bit string literal.");
 	 yyerrok;
 	}
 | bit_string_type_name error hex_integer
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between bit string type name and value in bit string literal.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between bit string type name and value in bit string literal.");
 	 yyerrok;
 	}
 | bit_string_type_name '#' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for bit string literal.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for bit string literal.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new duration_c(new neg_time_c(locloc(@$)), $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | TIME interval
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between 'TIME' and interval in duration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between 'TIME' and interval in duration.");
 	}
 | TIME '-' interval
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between 'TIME' and interval in duration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between 'TIME' and interval in duration.");
 	}
 | TIME error interval
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between 'TIME' and interval in duration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between 'TIME' and interval in duration.");
 	 yyerrok;
 	}
 | TIME error '-' interval
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between 'TIME' and interval in duration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between 'TIME' and interval in duration.");
 	 yyerrok;
 	}
 | TIME '#' error
 	{$$ = NULL;
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for duration.");
+	 yyerrok;
+	}
+| T_SHARP error
+	{$$ = NULL;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for duration.");
-	 yyerrok;
-	}
-| T_SHARP error
-	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid value for duration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | integer_d '_' hours
 	{$$ = new days_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | integer_d '_' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for hours in duration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for hours in duration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | integer_h '_' minutes
 	{$$ = new hours_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | integer_h '_' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for minutes in duration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for minutes in duration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | integer_m '_' seconds
 	{$$ = new minutes_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | integer_m '_' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for seconds in duration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for seconds in duration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | integer_s '_' milliseconds
 	{$$ = new seconds_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | integer_s '_' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for milliseconds in duration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for milliseconds in duration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new time_of_day_c($3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | TIME_OF_DAY daytime
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between 'TIME_OF_DAY' and daytime in time of day.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between 'TIME_OF_DAY' and daytime in time of day.");
 	}
 | TIME_OF_DAY error daytime
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between 'TIME_OF_DAY' and daytime in time of day.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between 'TIME_OF_DAY' and daytime in time of day.");
 	 yyerrok;
 	}
 | TIME_OF_DAY '#' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for time of day.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for time of day.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new daytime_c($1, $3, $5, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | day_hour day_minute ':' day_second
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':' missing between hours and minutes in daytime.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between hours and minutes in daytime.");
 	}
 | day_hour error day_minute ':' day_second
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting ':' between hours and minutes in daytime.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ':' between hours and minutes in daytime.");
 	 yyerrok;
 	}
 | day_hour ':' ':' day_second
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no minutes defined in daytime.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no minutes defined in daytime.");
 	}
 | day_hour ':' error ':' day_second
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid value for minutes in daytime.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for minutes in daytime.");
 	 yyerrok;
 	}
 | day_hour ':' day_minute day_second
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "':' missing between minutes and seconds in daytime.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "':' missing between minutes and seconds in daytime.");
 	}
 | day_hour ':' day_minute error day_second
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "expecting ':' between minutes and seconds in daytime.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "expecting ':' between minutes and seconds in daytime.");
 	 yyerrok;
 	}
 | day_hour ':' day_minute ':' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid value for seconds in daytime.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "invalid value for seconds in daytime.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new date_c($2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | DATE date_literal
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between 'DATE' and date literal in date.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between 'DATE' and date literal in date.");
 	}
 | DATE error date_literal
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between 'DATE' and date literal in date.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between 'DATE' and date literal in date.");
 	 yyerrok;
 	}
 | DATE '#' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for date.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for date.");
 	 yyerrok;
 	}
 | D_SHARP error
 	{$$ = NULL;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for date.");
 	{$$ = new date_literal_c($1, $3, $5, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | year month '-' day
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'-' missing between year and month in date literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'-' missing between year and month in date literal.");
 	}
 | year error month '-' day
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '-' between year and month in date literal.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '-' between year and month in date literal.");
 	 yyerrok;
 	}
 | year '-' '-' day
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no month defined in date literal.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no month defined in date literal.");
 	}
 | year '-' error '-' day
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid value for month in date literal.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for month in date literal.");
 	 yyerrok;
 	}
 | year '-' month day
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "':' missing between month and day in date literal.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "':' missing between month and day in date literal.");
 	}
 | year ':' month error day
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "expecting ':' between month and day in date literal.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "expecting ':' between month and day in date literal.");
 	 yyerrok;
 	}
 | year ':' month ':' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid value for day in date literal.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "invalid value for day in date literal.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new date_and_time_c($3, $5, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | DATE_AND_TIME date_literal '-' daytime
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between 'DATE_AND_TIME' and date literal in date and time.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between 'DATE_AND_TIME' and date literal in date and time.");
 	}
 | DATE_AND_TIME error date_literal '-' daytime
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between 'DATE_AND_TIME' and date literal in date and time.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '#' between 'DATE_AND_TIME' and date literal in date and time.");
 	 yyerrok;
 	}
 | DATE_AND_TIME '#' '-' daytime
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no value defined for date literal in date and time.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no value defined for date literal in date and time.");
 	}
 | DATE_AND_TIME '#' error '-' daytime
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for date literal in date and time.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for date literal in date and time.");
 	 yyerrok;
 	}
 | DATE_AND_TIME '#' date_literal daytime
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "'-' missing between date literal and daytime in date and time.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "'-' missing between date literal and daytime in date and time.");
 	}
 | DATE_AND_TIME '#' date_literal error daytime
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '-' between date literal and daytime in date and time.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "expecting '-' between date literal and daytime in date and time.");
 	 yyerrok;
 	}
 | DATE_AND_TIME '#' date_literal '-' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for daytime in date and time.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "invalid value for daytime in date and time.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new data_type_declaration_c($2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | TYPE END_TYPE
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no data type declared in data type(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no data type declared in data type(s) declaration.");
 	}
 | TYPE error type_declaration_list END_TYPE
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'TYPE' in data type(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'TYPE' in data type(s) declaration.");
 	 yyerrok;
 	}
 | TYPE error END_TYPE
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in data type(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in data type(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 type_declaration ';'
 	{$$ = new type_declaration_list_c(locloc(@$)); $$->add_element($1);}
 | type_declaration_list type_declaration ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
+| error ';'
+	{$$ = new type_declaration_list_c(locloc(@$));
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid data type declaration.");
+	 yyerrok;
+	}
 | type_declaration error
-	{$$ = NULL;
+	{$$ = new type_declaration_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at end of data type declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of data type declaration.");
 	 yyerrok;
 	}
 | type_declaration_list type_declaration error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of data type declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of data type declaration.");
 	 yyerrok;
 	}
 | type_declaration_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid data type declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid data type declaration.");
 	 yyerrok;
 	}
 | type_declaration_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after data type declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	}
 /* ERROR_CHECK_BEGIN */
 | identifier simple_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':' missing between data type name and specification in simple type declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between data type name and specification in simple type declaration.");
 	}
 | identifier ':' identifier
 	{$$ = NULL;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown data type defined in specification for data type declaration.");
 	}
 | identifier ':' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no specification defined in data type declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "no specification defined in data type declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new simple_spec_init_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | elementary_type_name constant
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':=' missing in specification with initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing in specification with initialization.");
 	}
 | prev_declared_simple_type_name constant
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':=' missing in specification with initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing in specification with initialization.");
 	}
 | identifier ASSIGN constant
 	{$$ = NULL;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@1), locl(@1), "unknown type defined in specification.");
 	}
 /* ERROR_CHECK_BEGIN */
 | identifier subrange_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':' missing between data type name and specification in subrange type declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between data type name and specification in subrange type declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 subrange_spec_init:
 	{$$ = new subrange_spec_init_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | subrange_specification signed_integer
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':=' missing in subrange specification with initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing in subrange specification with initialization.");
 	}
 /* ERROR_CHECK_END */
 ;
 subrange_specification:
 {$$ = new subrange_specification_c($1, NULL, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | integer_type_name '(' ')'
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no subrange defined in subrange specification.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no subrange defined in subrange specification.");
 	}
 | integer_type_name '(' error ')'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid subrange defined in subrange specification.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid subrange defined in subrange specification.");
 	 yyerrok;
 	}
 | integer_type_name '(' subrange error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "')' missing after subrange defined in subrange specification.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "')' missing after subrange defined in subrange specification.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new subrange_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | signed_integer signed_integer
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'..' missing between bounds in subrange definition.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'..' missing between bounds in subrange definition.");
 	}
 | signed_integer error signed_integer
 	{$$ = NULL;
-	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '..' between bounds in subrange definition.");
-	 print_err_msg(current_filename, locf(@1), locl(@2), "expecting '..' between bounds in subrange definition.");
+	 yyerrok;
 	}
 | signed_integer DOTDOT error
 	{$$ = NULL;
-	 yynerrs++;
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for upper bound in subrange definition.");
-	 print_err_msg(current_filename, locf(@1), locl(@2), "invalid value for upper bound in subrange definition.");
+	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 enumerated_type_declaration:
 	}
 /* ERROR_CHECK_BEGIN */
 | identifier enumerated_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':' missing between data type name and specification in enumerated type declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between data type name and specification in enumerated type declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new enumerated_spec_init_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | enumerated_specification enumerated_value
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':=' missing in enumerated specification with initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing in enumerated specification with initialization.");
 	}
 /* ERROR_CHECK_END */
 ;
 enumerated_specification:
 | prev_declared_enumerated_type_name
 /* ERROR_CHECK_BEGIN */
 | '(' ')'
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no enumerated value list defined in enumerated specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no enumerated value list defined in enumerated specification.");
 	}
 | '(' error ')'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid enumerated value list defined in enumerated specification.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid enumerated value list defined in enumerated specification.");
 	 yyerrok;
 	}
 | '(' enumerated_value_list error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "')' missing at the end of enumerated specification.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "')' missing at the end of enumerated specification.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new enumerated_value_list_c(locloc(@$)); $$->add_element($1);}
 | enumerated_value_list ',' enumerated_value
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN */
 | enumerated_value_list enumerated_value
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "',' missing in enumerated value list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing in enumerated value list.");
 	}
 | enumerated_value_list ',' error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "invalid value in enumerated value list.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value in enumerated value list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new enumerated_value_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | prev_declared_enumerated_type_name any_identifier
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'#' missing between enumerated type name and value in enumerated literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'#' missing between enumerated type name and value in enumerated literal.");
 	}
 | prev_declared_enumerated_type_name error any_identifier
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '#' between enumerated type name and value in enumerated literal.");
+	 print_err_msg(current_filename, locl(@1), locf(@3), "expecting '#' between enumerated type name and value in enumerated literal.");
 	 yyerrok;
 	}
 | prev_declared_enumerated_type_name '#' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for enumerated literal.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for enumerated literal.");
 	 yyerrok;
 	}
 | identifier '#' any_identifier
 	{$$ = NULL;
 	 yynerrs++;
 	}
 /* ERROR_CHECK_BEGIN */
 | identifier array_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':' missing between data type name and specification in array type declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between data type name and specification in array type declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 array_spec_init:
 	{$$ = new array_spec_init_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | array_specification array_initialization
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':=' missing in array specification with initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing in array specification with initialization.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new array_specification_c($3, $6, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | ARRAY array_subrange_list ']' OF non_generic_type_name
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'[' missing before subrange list in array specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'[' missing before subrange list in array specification.");
 	}
 | ARRAY error array_subrange_list ']' OF non_generic_type_name
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '[' after 'ARRAY' in array specification.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '[' after 'ARRAY' in array specification.");
 	 yyerrok;
 	}
 | ARRAY '[' ']' OF non_generic_type_name
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no subrange list defined in array specification.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no subrange list defined in array specification.");
 	}
 | ARRAY '[' error ']' OF non_generic_type_name
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid subrange list defined in array specification.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid subrange list defined in array specification.");
 	 yyerrok;
 	}
 | ARRAY OF non_generic_type_name
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no subrange list defined in array specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no subrange list defined in array specification.");
 	}
 | ARRAY error OF non_generic_type_name
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid subrange list defined in array specification.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid subrange list defined in array specification.");
 	 yyerrok;
 	}
 | ARRAY '[' array_subrange_list OF non_generic_type_name
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "']' missing after subrange list in array specification.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "']' missing after subrange list in array specification.");
 	}
 | ARRAY '[' array_subrange_list error OF non_generic_type_name
 	{$$ = NULL;
-	 yynerrs++;
+	 print_err_msg(current_filename, locf(@4), locl(@4), "expecting '[' after subrange list in array specification.");
-	 print_err_msg(current_filename, locf(@3), locl(@5), "expecting '[' after subrange list in array specification.");
+	 yyerrok;
 	}
 | ARRAY '[' array_subrange_list ']' non_generic_type_name
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@5), "'OF' missing between subrange list and item type name in array specification.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "'OF' missing between subrange list and item type name in array specification.");
 	}
 | ARRAY '[' array_subrange_list ']' error non_generic_type_name
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@6), "expecting 'OF' between subrange list and item type name in array specification.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "expecting 'OF' between subrange list and item type name in array specification.");
 	 yyerrok;
 	}
 | ARRAY '[' array_subrange_list ']' OF error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "no itme data type defined in array specification.");
+	 print_err_msg(current_filename, locf(@6), locl(@6), "no item data type defined in array specification.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new array_subrange_list_c(locloc(@$)); $$->add_element($1);}
 | array_subrange_list ',' subrange
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN */
 | array_subrange_list subrange
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "',' missing in subrange list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing in subrange list.");
 	}
 | array_subrange_list ',' error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid subrange in subrange list.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid subrange in subrange list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $2;}
 /* ERROR_CHECK_BEGIN */
 | '[' ']'
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no initial values list defined in array initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no initial values list defined in array initialization.");
 	}
 | '[' error ']'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "invalid initial values list defined in array initialization.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid initial values list defined in array initialization.");
 	 yyerrok;
 	}
 | '[' array_initial_elements_list error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "']' missing at the end of array initialization.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "']' missing at the end of array initialization.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new array_initial_elements_list_c(locloc(@$)); $$->add_element($1);}
 | array_initial_elements_list ',' array_initial_elements
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN
 | array_initial_elements_list ',' error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid array initial value in array initial values list.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid array initial value in array initial values list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | integer '(' array_initial_element ')'
 	{$$ = new array_initial_elements_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN
 | integer '(' error ')'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid array initial value in array initial values list.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid array initial value in array initial values list.");
 	 yyerrok;
 	}
 | integer '(' array_initial_element error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "')' missing at the end of array initial value in array initial values list.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "')' missing at the end of array initial value in array initial values list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	}
 /* ERROR_CHECK_BEGIN */
 | identifier structure_specification
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':' missing between data type name and specification in structure type declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between data type name and specification in structure type declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new initialized_structure_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | prev_declared_structure_type_name structure_initialization
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':=' missing in structure specification with initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing in structure specification with initialization.");
 	}
 | identifier ASSIGN structure_initialization
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "unknown type name for structure specification with initialization.");
+	 print_err_msg(current_filename, locf(@1), locl(@1), "unknown type name for structure specification with initialization.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $2;}
 /* ERROR_CHECK_BEGIN */
 | STRUCT END_STRUCT
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no structure element declared in structure type declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no structure element declared in structure type declaration.");
 	}
 | STRUCT error structure_element_declaration_list END_STRUCT
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'STRUCT' in structure type declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'STRUCT' in structure type declaration.");
 	 yyerrok;
 	}
 | STRUCT error END_STRUCT
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in structure type declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in structure type declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 structure_element_declaration ';'
 	{$$ = new structure_element_declaration_list_c(locloc(@$)); $$->add_element($1);}
 | structure_element_declaration_list structure_element_declaration ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
+| error ';'
+	{$$ = new structure_element_declaration_list_c(locloc(@$));
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid structure element declaration.");
+	 yyerrok;
+	}
 | structure_element_declaration error
-	{$$ = NULL;
+	{$$ = new structure_element_declaration_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at end of structure element declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of structure element declaration.");
 	 yyerrok;
 	}
 | structure_element_declaration_list structure_element_declaration error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of structure element declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of structure element declaration.");
 	 yyerrok;
 	}
 | structure_element_declaration_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid structure element declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid structure element declaration.");
 	 yyerrok;
 	}
 | structure_element_declaration_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after structure element declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new structure_element_declaration_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | structure_element_name simple_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between structure element name and simple specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between structure element name and simple specification.");
 	}
 | structure_element_name subrange_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between structure element name and subrange specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between structure element name and subrange specification.");
 	}
 | structure_element_name enumerated_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between structure element name and enumerated specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between structure element name and enumerated specification.");
 	}
 | structure_element_name array_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between structure element name and array specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between structure element name and array specification.");
 	}
 | structure_element_name initialized_structure
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between structure element name and structure specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between structure element name and structure specification.");
 	}
 | structure_element_name ':' identifier
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown variable type defined in structure element declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown variable type defined in structure element declaration.");
 	}
 | structure_element_name ':' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no specification defined in structure element declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no specification defined in structure element declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 '(' structure_element_initialization_list ')'
 	{$$ = $2;}
 /* ERROR_CHECK_BEGIN */
 | '(' error ')'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid structure element initialization list in structure initialization.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid structure element initialization list in structure initialization.");
 	 yyerrok;
 	}
 | '(' structure_element_initialization_list error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ')' at the end of structure element initialization list in structure initialization.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "expecting ')' at the end of structure element initialization list in structure initialization.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new structure_element_initialization_list_c(locloc(@$)); $$->add_element($1);}
 | structure_element_initialization_list ',' structure_element_initialization
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN
 | structure_element_initialization_list structure_element_initialization
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "',' missing in structure element initialization list in structure initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing in structure element initialization list in structure initialization.");
 	}
 | structure_element_initialization_list ',' error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid structure element initialization in structure initialization.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid structure element initialization in structure initialization.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new structure_element_initialization_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | structure_element_name constant
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':=' missing in structure element initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing in structure element initialization.");
 	}
 | structure_element_name enumerated_value
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':=' missing in enumerated structure element initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing in enumerated structure element initialization.");
 	}
 | structure_element_name array_initialization
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':=' missing in array structure element initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing in array structure element initialization.");
 	}
 | structure_element_name structure_initialization
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':=' missing in structured structure element initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing in structured structure element initialization.");
 	}
 /* ERROR_CHECK_END */
 ;
 /* NOTE: in order to remove a reduce/reduce conflict,
 	{$$ = new input_declarations_c(new non_retain_option_c(locloc(@2)), $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR_INPUT END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no variable declared in input variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no variable declared in input variable(s) declaration.");
 	}
 | VAR_INPUT RETAIN END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable declared in retentive input variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable declared in retentive input variable(s) declaration.");
 	}
 | VAR_INPUT NON_RETAIN END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable declared in non-retentive input variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable declared in non-retentive input variable(s) declaration.");
 	}
 | VAR_INPUT error input_declaration_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'VAR_INPUT' in input variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'VAR_INPUT' in input variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_INPUT RETAIN error input_declaration_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'RETAIN' in retentive input variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'RETAIN' in retentive input variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_INPUT NON_RETAIN error input_declaration_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'NON_RETAIN' in non-retentive input variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'NON_RETAIN' in non-retentive input variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_INPUT error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in input variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in input variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_INPUT RETAIN error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unknown error in retentive input variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown error in retentive input variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_INPUT NON_RETAIN error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unknown error in non-retentive input variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown error in non-retentive input variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 input_declaration ';'
 	{$$ = new input_declaration_list_c(locloc(@$)); $$->add_element($1);}
 | input_declaration_list input_declaration ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
+| error ';'
+	{$$ = new input_declaration_list_c(locloc(@$));
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid input variable(s) declaration.");
+	 yyerrok;
+	}
 | input_declaration error
-	{$$ = NULL;
+	{$$ = new input_declaration_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at end of input variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of input variable(s) declaration.");
 	 yyerrok;
 	}
 | input_declaration_list input_declaration error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of input variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of input variable(s) declaration.");
 	 yyerrok;
 	}
 | input_declaration_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid input variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid input variable(s) declaration.");
 	 yyerrok;
 	}
 | input_declaration_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after input variable(s) declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new edge_declaration_c(new falling_edge_option_c(locloc(@3)), $1, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | var1_list BOOL R_EDGE
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and specification.");
 	}
 | var1_list BOOL F_EDGE
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and specification.");
 	}
 | var1_list ':' BOOL R_EDGE F_EDGE
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@4), "'R_EDGE' and 'F_EDGE' can't be present at the same time in edge declaration.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "'R_EDGE' and 'F_EDGE' can't be present at the same time in edge declaration.");
 	}
 | var1_list ':' R_EDGE
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "'BOOL' missing in edge declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "'BOOL' missing in edge declaration.");
 	}
 | var1_list ':' F_EDGE
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "'BOOL' missing in edge declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "'BOOL' missing in edge declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new var1_init_decl_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | var1_list simple_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and simple specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and simple specification.");
 	}
 | var1_list subrange_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and subrange specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and subrange specification.");
 	}
 | var1_list enumerated_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and enumerated specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and enumerated specification.");
 	}
 | var1_list ':' identifier
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown variable type defined in variable declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown variable type defined in variable declaration.");
 	}
 | var1_list ':' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no specification defined in variable declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no specification defined in variable declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $1; $$->add_element($3);
 	 variable_name_symtable.insert($3, prev_declared_variable_name_token);
 	}
 /* ERROR_CHECK_BEGIN */
 | var1_list variable_name
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "',' missing in variable list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing in variable list.");
 	}
 | var1_list ',' error
-	{$$ = NULL;
+	{$$ = $1;
-	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ',' in variable declaration.");
+	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new array_var_init_decl_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | var1_list array_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and array specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and array specification.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new structured_var_init_decl_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | var1_list initialized_structure
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and structured specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and structured specification.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new fb_name_decl_c($1, $2, $4, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | fb_name_list_with_colon ASSIGN structure_initialization
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no function block type name defined in function block declaration with initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no function block type name defined in function block declaration with initialization.");
 	}
 | fb_name_list_with_colon function_block_type_name structure_initialization
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':=' missing in function block declaration with initialization.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "':=' missing in function block declaration with initialization.");
 	}
 | fb_name_list_with_colon function_block_type_name ASSIGN error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid initialization in function block declaration.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid initialization in function block declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new output_declarations_c(new non_retain_option_c(locloc(@2)), $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR_OUTPUT END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no variable declared in output variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no variable declared in output variable(s) declaration.");
 	}
 | VAR_OUTPUT RETAIN END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable declared in retentive output variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable declared in retentive output variable(s) declaration.");
 	}
 | VAR_OUTPUT NON_RETAIN END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable declared in non-retentive output variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable declared in non-retentive output variable(s) declaration.");
 	}
 | VAR_OUTPUT error var_init_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'VAR_OUPUT' in output variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'VAR_OUPUT' in output variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_OUTPUT RETAIN error var_init_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'RETAIN' in retentive output variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'RETAIN' in retentive output variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_OUTPUT NON_RETAIN error var_init_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'NON_RETAIN' in non-retentive output variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'NON_RETAIN' in non-retentive output variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_OUTPUT error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in output variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in output variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_OUTPUT RETAIN error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unknown error in retentive output variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown error in retentive output variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_OUTPUT NON_RETAIN error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unknown error in non-retentive output variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown error in non-retentive output variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new input_output_declarations_c($2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR_IN_OUT END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no variable declared in in_out variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no variable declared in in_out variable(s) declaration.");
 	}
 | VAR_IN_OUT error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in in_out variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in in_out variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 var_declaration ';'
 	{$$ = new var_declaration_list_c(locloc(@$)); $$->add_element($1);}
 | var_declaration_list var_declaration ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
+| error ';'
+	{$$ = new var_declaration_list_c(locloc(@$));
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid variable(s) declaration.");
+	 yyerrok;
+	}
 | var_declaration error
-	{$$ = NULL;
+	{$$ = new var_declaration_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at end of variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of variable(s) declaration.");
 	 yyerrok;
 	}
 | var_declaration_list var_declaration error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of variable(s) declaration.");
 	 yyerrok;
 	}
 | var_declaration_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid variable(s) declaration.");
 	 yyerrok;
 	}
 | var_declaration_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after variable(s) declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 | structured_var_declaration
 | string_var_declaration
 ;
 var1_declaration:
-var1_list  ':' simple_specification
+var1_list ':' simple_specification
 	{$$ = new var1_init_decl_c($1, $3, locloc(@$));}
-| var1_list  ':' subrange_specification
+| var1_list ':' subrange_specification
 	{$$ = new var1_init_decl_c($1, $3, locloc(@$));}
-| var1_list  ':' enumerated_specification
+| var1_list ':' enumerated_specification
 	{$$ = new var1_init_decl_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | var1_list simple_specification
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and simple specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and simple specification.");
 	}
 | var1_list subrange_specification
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and subrange specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and subrange specification.");
 	}
 | var1_list enumerated_specification
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and enumerated specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and enumerated specification.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new array_var_declaration_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | var1_list array_specification
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and array specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and array specification.");
 	}
 /* ERROR_CHECK_END */
 ;
 structured_var_declaration:
 	{$$ = new structured_var_declaration_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | var1_list prev_declared_structure_type_name
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and structured specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and structured specification.");
 	}
 | var1_list ':' identifier
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown type name in structured variable declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown type name in structured variable declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new var_declarations_c(new constant_option_c(locloc(@2)), $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no variable declared in variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no variable declared in variable(s) declaration.");
 	}
 | VAR CONSTANT END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable declared in constant variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable declared in constant variable(s) declaration.");
 	}
 | VAR error var_init_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'VAR' in variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@3), "unexpected token after 'VAR' in variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR CONSTANT error var_init_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'CONSTANT' in constant variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'CONSTANT' in constant variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR CONSTANT error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in constant variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown error in constant variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new retentive_var_declarations_c($3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR RETAIN END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable declared in retentive variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable declared in retentive variable(s) declaration.");
 	}
 | VAR RETAIN error var_init_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'RETAIN' in retentive variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'RETAIN' in retentive variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR RETAIN error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in retentive variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown error in retentive variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new located_var_declarations_c(new non_retain_option_c(locloc(@2)), $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR NON_RETAIN END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable declared in non-retentive located variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable declared in non-retentive located variable(s) declaration.");
 	}
 | VAR error located_var_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'VAR' in located variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'VAR' in located variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR CONSTANT error located_var_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'CONSTANT' in constant located variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'CONSTANT' in constant located variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR RETAIN error located_var_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'RETAIN' in retentive located variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'RETAIN' in retentive located variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR NON_RETAIN error located_var_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'NON_RETAIN' in non-retentive located variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'NON_RETAIN' in non-retentive located variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR NON_RETAIN error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in non retentive variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown error in non retentive variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 located_var_decl ';'
 	{$$ = new located_var_decl_list_c(locloc(@$)); $$->add_element($1);}
 | located_var_decl_list located_var_decl ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
+| error ';'
+	{$$ = new located_var_decl_list_c(locloc(@$));
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid located variable declaration.");
+	 yyerrok;
+	}
 | located_var_decl error
-	{$$ = NULL;
+	{$$ = new located_var_decl_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at end of located variable declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of located variable declaration.");
 	 yyerrok;
 	}
 | located_var_decl_list located_var_decl error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of located variable declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of located variable declaration.");
 	 yyerrok;
 	}
 | located_var_decl_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid located variable declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid located variable declaration.");
 	 yyerrok;
 	}
 | located_var_decl_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after located variable declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new located_var_decl_c(NULL, $1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | variable_name location located_var_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between located variable location and specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between located variable location and specification.");
 	}
 | location located_var_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between located variable location and specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between located variable location and specification.");
 	}
 | variable_name location ':' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no specification defined in located variable declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no specification defined in located variable declaration.");
 	 yyerrok;
 	}
 | location ':' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no specification defined in located variable declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no specification defined in located variable declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new external_var_declarations_c(new constant_option_c(locloc(@2)), $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR_EXTERNAL END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no variable declared in external variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no variable declared in external variable(s) declaration.");
 	}
 | VAR_EXTERNAL CONSTANT END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "no variable declared in constant external variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable declared in constant external variable(s) declaration.");
 	}
 | VAR_EXTERNAL error external_declaration_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@4), "unexpected token after 'VAR_EXTERNAL' in external variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'VAR_EXTERNAL' in external variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_EXTERNAL CONSTANT error external_declaration_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@5), "unexpected token after 'CONSTANT' in constant external variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'CONSTANT' in constant external variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_EXTERNAL error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in external variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in external variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_EXTERNAL CONSTANT error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unknown error in constant external variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown error in constant external variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 external_declaration ';'
 	{$$ = new external_declaration_list_c(locloc(@$)); $$->add_element($1);}
 | external_declaration_list external_declaration ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
+| error ';'
+	{$$ = new external_declaration_list_c(locloc(@$));
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid external variable declaration.");
+	 yyerrok;
+	}
 | external_declaration error
-	{$$ = NULL;
+	{$$ = new external_declaration_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at end of external variable declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of external variable declaration.");
 	 yyerrok;
 	}
 | external_declaration_list external_declaration error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of external variable declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of external variable declaration.");
 	 yyerrok;
 	}
 | external_declaration_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid external variable declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid external variable declaration.");
 	 yyerrok;
 	}
 | external_declaration_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after external variable declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	}
 /* ERROR_CHECK_BEGIN */
 | global_var_name simple_specification
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between external variable name and simple specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between external variable name and simple specification.");
 	}
 | global_var_name subrange_specification
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between external variable name and subrange specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between external variable name and subrange specification.");
 	}
 | global_var_name enumerated_specification
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between external variable name and enumerated specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between external variable name and enumerated specification.");
 	}
 | global_var_name array_specification
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between external variable name and array specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between external variable name and array specification.");
 	}
 | global_var_name prev_declared_structure_type_name
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between external variable name and structured specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between external variable name and structured specification.");
 	}
 | global_var_name function_block_type_name
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between external variable name and function block type specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between external variable name and function block type specification.");
 	}
 | global_var_name ':' identifier
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown type name in external variable declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown type name in external variable declaration.");
 	}
 | global_var_name ':' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no specification defined in external variable declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no specification defined in external variable declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new global_var_declarations_c(new retain_option_c(locloc(@2)), $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR_GLOBAL END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no variable declared in global variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no variable declared in global variable(s) declaration.");
 	}
 | VAR_GLOBAL CONSTANT END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable declared in constant global variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable declared in constant global variable(s) declaration.");
 	}
 | VAR_GLOBAL RETAIN END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable declared in retentive global variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable declared in retentive global variable(s) declaration.");
 	}
 | VAR_GLOBAL error global_var_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'VAR_GLOBAL' in global variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'VAR_GLOBAL' in global variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_GLOBAL CONSTANT error global_var_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'CONSTANT' in constant global variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'CONSTANT' in constant global variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_GLOBAL RETAIN error global_var_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'RETAIN' in retentive global variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'RETAIN' in retentive global variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_GLOBAL error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in global variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in global variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_GLOBAL CONSTANT error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unknown error in constant global variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown error in constant global variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_GLOBAL RETAIN error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unknown error in constant global variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown error in constant global variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 global_var_decl ';'
 	{$$ = new global_var_decl_list_c(locloc(@$)); $$->add_element($1);}
 | global_var_decl_list global_var_decl ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
+| error ';'
+	{$$ = new global_var_decl_list_c(locloc(@$));
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid global variable(s) declaration.");
+	 yyerrok;
+	}
 | global_var_decl error
-	{$$ = NULL;
+	{$$ = new global_var_decl_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at end of global variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of global variable(s) declaration.");
 	 yyerrok;
 	}
 | global_var_decl_list global_var_decl error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of global variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of global variable(s) declaration.");
 	 yyerrok;
 	}
 | global_var_decl_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid global variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid global variable(s) declaration.");
 	 yyerrok;
 	}
 | global_var_decl_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after global variable(s) declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new global_var_decl_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | global_var_list located_var_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between global variable list and type specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between global variable list and type specification.");
 	}
 | global_var_name location located_var_spec_init
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "':' missing between global variable specification and type specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between global variable specification and type specification.");
 	}
 | global_var_spec function_block_type_name
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between global variable specification and function block type specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between global variable specification and function block type specification.");
 	}
 | global_var_spec ':' identifier
 	{$$ = NULL;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown variable type defined in global variable declaration.");
 	}
 | global_var_spec ':' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no specification defined in global variable declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no specification defined in global variable declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 AT direct_variable
 	{$$ = new location_c($2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | AT error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid location in location declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid location in location declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $1; $$->add_element($3);
 	 variable_name_symtable.insert($3, prev_declared_global_var_name_token);
 	}
 /* ERROR_CHECK_BEGIN */
 | global_var_list global_var_name
-	{$$ = NULL;
+	{$$ = new global_var_list_c(locloc(@$));
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "',' missing in global variable list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing in global variable list.");
 	}
 | global_var_list ',' error
-	{$$ = NULL;
+	{$$ = $1;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ',' in global variable declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new single_byte_string_var_declaration_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | var1_list single_byte_string_spec
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and string type specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and string type specification.");
 	}
 /* ERROR_CHECK_END */
 ;
 /* NOTE: The constructs
 | STRING '[' integer ']' ASSIGN single_byte_character_string
 	{$$ = new single_byte_string_spec_c($3, $6, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | STRING '[' error ']'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid length value for limited string type specification.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid length value for limited string type specification.");
 	 yyerrok;
 	}
 | STRING '[' error ']' ASSIGN single_byte_character_string
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid length value for limited string type specification.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid length value for limited string type specification.");
 	 yyerrok;
 	}
 | STRING '[' ']'
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "missing length value for limited string type specification.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "missing length value for limited string type specification.");
 	}
 | STRING '[' ']' ASSIGN single_byte_character_string
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "missing length value for limited string type specification.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "missing length value for limited string type specification.");
 	}
 | STRING '[' integer error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting ']' after length definition for limited string type specification.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "expecting ']' after length definition for limited string type specification.");
 	 yyerrok;
 	}
 | STRING '[' integer error ASSIGN single_byte_character_string
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "expecting ']' after length definition for limited string type specification.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "expecting ']' after length definition for limited string type specification.");
 	 yyerrok;
 	}
 | STRING '[' integer ']' single_byte_character_string
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@5), "':=' missing before limited string type initialization.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "':=' missing before limited string type initialization.");
 	}
 | STRING '[' integer ']' ASSIGN error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@5), locl(@5), "invalid value for limited string type initialization.");
+	 print_err_msg(current_filename, locf(@6), locl(@6), "invalid value for limited string type initialization.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new double_byte_string_var_declaration_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | var1_list double_byte_string_spec
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between variable list and double byte string type specification.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between variable list and double byte string type specification.");
 	}
 /* ERROR_CHECK_END */
 ;
 double_byte_string_spec:
 | WSTRING '[' integer ']' ASSIGN double_byte_character_string
 	{$$ = new double_byte_string_spec_c($3, $6, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | WSTRING '[' error ']'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid length value for limited double byte string type specification.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid length value for limited double byte string type specification.");
 	 yyerrok;
 	}
 | WSTRING '[' error ']' ASSIGN single_byte_character_string
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid length value for limited double byte string type specification.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid length value for limited double byte string type specification.");
 	 yyerrok;
 	}
 | WSTRING '[' ']'
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "missing length value for limited double byte string type specification.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "missing length value for limited double byte string type specification.");
 	}
 | WSTRING '[' ']' ASSIGN single_byte_character_string
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "missing length value for limited double byte string type specification.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "missing length value for limited double byte string type specification.");
 	}
 | WSTRING '[' integer error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting ']' after length definition for limited double byte string type specification.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "expecting ']' after length definition for limited double byte string type specification.");
 	 yyerrok;
 	}
 | WSTRING '[' integer error ASSIGN single_byte_character_string
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "expecting ']' after length definition for limited double byte string type specification.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "expecting ']' after length definition for limited double byte string type specification.");
 	 yyerrok;
 	}
 | WSTRING '[' integer ']' single_byte_character_string
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@5), "':=' missing before limited double byte string type initialization.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "':=' missing before limited double byte string type initialization.");
 	}
 | WSTRING '[' integer ']' ASSIGN error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@5), locl(@5), "invalid value for limited double byte string type initialization.");
+	 print_err_msg(current_filename, locf(@6), locl(@6), "invalid value for limited double byte string type initialization.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | VAR NON_RETAIN incompl_located_var_decl_list END_VAR
 	{$$ = new incompl_located_var_declarations_c(new non_retain_option_c(locloc(@2)), $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR error incompl_located_var_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'VAR' in incomplete located variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'VAR' in incomplete located variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR RETAIN error incompl_located_var_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'RETAIN' in retentive located variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'RETAIN' in retentive located variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR NON_RETAIN error incompl_located_var_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'NON_RETAIN' in non-retentive located variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'NON_RETAIN' in non-retentive located variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new incompl_located_var_decl_list_c(locloc(@$)); $$->add_element($1);}
 | incompl_located_var_decl_list incompl_located_var_decl ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | incompl_located_var_decl error
-	{$$ = NULL;
+	{$$ = new incompl_located_var_decl_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at end of incomplete located variable declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of incomplete located variable declaration.");
 	 yyerrok;
 	}
 | incompl_located_var_decl_list incompl_located_var_decl error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of incomplete located variable declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of incomplete located variable declaration.");
 	 yyerrok;
 	}
 | incompl_located_var_decl_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid incomplete located variable declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid incomplete located variable declaration.");
 	 yyerrok;
 	}
 | incompl_located_var_decl_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after incomplete located variable declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 incompl_located_var_decl:
 variable_name incompl_location ':' var_spec
 	{$$ = new incompl_located_var_decl_c($1, $2, $4, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
+| variable_name incompl_location var_spec
+	{$$ = NULL;
+	 yynerrs++;
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing between incomplete located variable and type specification.");
+	}
 | variable_name incompl_location ':' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no specification defined in incomplete located variable declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no specification defined in incomplete located variable declaration.");
 	 yyerrok;
-	}
-| variable_name incompl_location var_spec
-	{$$ = NULL;
-	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':' missing between incomplete located variable and type specification.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new var_init_decl_list_c(locloc(@$)); $$->add_element($1);}
 | var_init_decl_list var_init_decl ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | var_init_decl_list var_init_decl error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of variable(s) declaration.");
 	 yyerrok;
 	}
 | var_init_decl_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	}
 /* ERROR_CHECK_BEGIN */
 | function_name_declaration elementary_type_name io_OR_function_var_declarations_list function_body END_FUNCTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':' missing after function name in function declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing after function name in function declaration.");
 	}
 | function_name_declaration derived_type_name io_OR_function_var_declarations_list function_body END_FUNCTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':' missing after function name in function declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing after function name in function declaration.");
 	}
 | function_name_declaration error derived_type_name io_OR_function_var_declarations_list function_body END_FUNCTION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting ':' after function name in function declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ':' after function name in function declaration.");
 	 yyerrok;
 	}
 | function_name_declaration ':' io_OR_function_var_declarations_list function_body END_FUNCTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no return type defined in function declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no return type defined in function declaration.");
 	}
 | function_name_declaration ':' error io_OR_function_var_declarations_list function_body END_FUNCTION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid return type defined in function declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid return type defined in function declaration.");
 	 yyerrok;
 	}
 | function_name_declaration ':' identifier io_OR_function_var_declarations_list function_body END_FUNCTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unknown return type defined in function declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unknown return type defined in function declaration.");
 	}
 | function_name_declaration ':' elementary_type_name function_body END_FUNCTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no variable(s) declared in function declaration.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no variable(s) declared in function declaration.");
 	}
 | function_name_declaration ':' derived_type_name function_body END_FUNCTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no variable(s) declared in function declaration.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no variable(s) declared in function declaration.");
 	}
 | function_name_declaration ':' elementary_type_name io_OR_function_var_declarations_list END_FUNCTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@5), "no body defined in function declaration.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "no body defined in function declaration.");
 	}
 | function_name_declaration ':' derived_type_name io_OR_function_var_declarations_list END_FUNCTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@5), "no body defined in function declaration.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "no body defined in function declaration.");
 	}
 | function_name_declaration ':' elementary_type_name END_FUNCTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no variable(s) declared and body defined in function declaration.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no variable(s) declared and body defined in function declaration.");
 	}
 | function_name_declaration ':' derived_type_name END_FUNCTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no variable(s) declared and body defined in function declaration.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no variable(s) declared and body defined in function declaration.");
 	}
 | function_name_declaration error END_FUNCTION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in function declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in function declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	 variable_name_symtable.insert($2, prev_declared_variable_name_token);
 	}
 /* ERROR_CHECK_BEGIN */
 | FUNCTION error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "no function name defined in function declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no function name defined in function declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new var_declarations_list_c(locloc(@1));$$->add_element($1);}
 | io_OR_function_var_declarations_list io_var_declarations
 	{$$ = $1; $$->add_element($2);}
 | io_OR_function_var_declarations_list function_var_decls
 	{$$ = $1; $$->add_element($2);}
+/* ERROR_CHECK_BEGIN */
+| io_OR_function_var_declarations_list retentive_var_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected retentive variable(s) declaration in function declaration.");
+	}
+| io_OR_function_var_declarations_list located_var_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected located variable(s) declaration in function declaration.");
+	}
+| io_OR_function_var_declarations_list external_var_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected external variable(s) declaration in function declaration.");
+	}
+| io_OR_function_var_declarations_list global_var_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected global variable(s) declaration in function declaration.");
+	}
+| io_OR_function_var_declarations_list incompl_located_var_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected incomplete located variable(s) declaration in function declaration.");
+	}
+| io_OR_function_var_declarations_list temp_var_decls
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected temporary located variable(s) declaration in function declaration.");
+	}
+| io_OR_function_var_declarations_list non_retentive_var_decls
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected non-retentive variable(s) declaration in function declaration.");
+	}
+/*| io_OR_function_var_declarations_list access_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected access variable(s) declaration in function declaration.");
+	}*/
+| io_OR_function_var_declarations_list instance_specific_initializations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected instance specific initialization(s) in function declaration.");
+	}
+/* ERROR_CHECK_END */
 ;
 io_var_declarations:
 input_declarations
 | VAR var2_init_decl_list END_VAR
 	{$$ = new function_var_decls_c(NULL, $2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR error var_init_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'VAR' in function variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'VAR' in function variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR CONSTANT error var_init_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'CONSTANT' in constant function variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'CONSTANT' in constant function variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new var2_init_decl_list_c(locloc(@$)); $$->add_element($1);}
 | var2_init_decl_list var2_init_decl ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | var2_init_decl error
-	{$$ = NULL;
+	{$$ = new var2_init_decl_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at end of function variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of function variable(s) declaration.");
 	 yyerrok;
 	}
 | var2_init_decl_list var2_init_decl error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of function variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of function variable(s) declaration.");
 	 yyerrok;
 	}
 | var2_init_decl_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid function variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid function variable(s) declaration.");
 	 yyerrok;
 	}
 | var2_init_decl_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after function variable(s) declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	}
 /* ERROR_CHECK_BEGIN */
 | FUNCTION_BLOCK io_OR_other_var_declarations_list function_block_body END_FUNCTION_BLOCK
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no function block name defined in function block declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no function block name defined in function block declaration.");
 	}
 | FUNCTION_BLOCK error io_OR_other_var_declarations_list function_block_body END_FUNCTION_BLOCK
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid function block name in function block declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid function block name in function block declaration.");
 	 yyerrok;
 	}
 | FUNCTION_BLOCK derived_function_block_name function_block_body END_FUNCTION_BLOCK
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable(s) declared in function declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable(s) declared in function declaration.");
 	}
 | FUNCTION_BLOCK derived_function_block_name io_OR_other_var_declarations_list END_FUNCTION_BLOCK
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no body defined in function block declaration.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no body defined in function block declaration.");
 	}
 | FUNCTION_BLOCK derived_function_block_name END_FUNCTION_BLOCK
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable(s) declared and body defined in function block declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable(s) declared and body defined in function block declaration.");
 	}
 | FUNCTION_BLOCK error END_FUNCTION_BLOCK
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in function block declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in function block declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 {$$ = new var_declarations_list_c(locloc(@$));$$->add_element($1);}
 | io_OR_other_var_declarations_list io_var_declarations
 	{$$ = $1; $$->add_element($2);}
 | io_OR_other_var_declarations_list other_var_declarations
 	{$$ = $1; $$->add_element($2);}
+/* ERROR_CHECK_BEGIN */
+| io_OR_other_var_declarations_list located_var_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected located variable(s) declaration in function block declaration.");
+	}
+| io_OR_other_var_declarations_list global_var_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected global variable(s) declaration in function block declaration.");
+	}
+/*| io_OR_other_var_declarations_list access_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected access variable(s) declaration in function block declaration.");
+	}*/
+| io_OR_other_var_declarations_list instance_specific_initializations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected instance specific initialization(s) in function block declaration.");
+	}
+/* ERROR_CHECK_END */
 ;
 /* NOTE:
 *  The IEC specification gives the following definition:
 *  other_var_declarations ::=
 	{$$ = new temp_var_decls_c($2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR_TEMP END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no variable declared in temporary variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no variable declared in temporary variable(s) declaration.");
 	}
 | VAR_TEMP error temp_var_decls_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'VAR_TEMP' in function variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'VAR_TEMP' in function variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 temp_var_decl ';'
 	{$$ = new temp_var_decls_list_c(locloc(@$)); $$->add_element($1);}
 | temp_var_decls_list temp_var_decl ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
+| error ';'
+	{$$ = new temp_var_decls_list_c(locloc(@$));
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid temporary variable(s) declaration.");
+	 yyerrok;
+	}
 | temp_var_decl error
-	{$$ = NULL;
+	{$$ = new temp_var_decls_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at end of temporary variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at end of temporary variable(s) declaration.");
 	 yyerrok;
 	}
 | temp_var_decls_list temp_var_decl error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of temporary variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of temporary variable(s) declaration.");
 	 yyerrok;
 	}
 | temp_var_decls_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid temporary variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid temporary variable(s) declaration.");
 	 yyerrok;
 	}
 | temp_var_decls_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after temporary variable(s) declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 VAR NON_RETAIN var_init_decl_list END_VAR
 	{$$ = new non_retentive_var_decls_c($3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR NON_RETAIN error var_init_decl_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'NON_RETAIN' in non-retentive temporary variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'NON_RETAIN' in non-retentive temporary variable(s) declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	}
 /* ERROR_CHECK_BEGIN */
 | PROGRAM program_var_declarations_list function_block_body END_PROGRAM
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no program name defined in program declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no program name defined in program declaration.");
 	}
 | PROGRAM error program_var_declarations_list function_block_body END_PROGRAM
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid program name in program declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid program name in program declaration.");
 	 yyerrok;
 	}
 | PROGRAM program_type_name function_block_body END_PROGRAM
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable(s) declared in program declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable(s) declared in program declaration.");
 	}
 | PROGRAM program_type_name program_var_declarations_list END_PROGRAM
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no body defined in program declaration.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no body defined in program declaration.");
 	}
 | PROGRAM program_type_name END_PROGRAM
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no variable(s) declared and body defined in program declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no variable(s) declared and body defined in program declaration.");
 	}
 | PROGRAM error END_PROGRAM
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in program declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in program declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $1; $$->add_element($2);}
 /*
 | program_var_declarations_list program_access_decls
 	{$$ = $1; $$->add_element($2);}
 */
+/* ERROR_CHECK_BEGIN */
+| program_var_declarations_list global_var_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected global variable(s) declaration in function block declaration.");
+	}
+/*| program_var_declarations_list access_declarations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected access variable(s) declaration in function block declaration.");
+	}*/
+| program_var_declarations_list instance_specific_initializations
+	{$$ = $1;
+	 yynerrs++;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected instance specific initialization(s) in function block declaration.");
+	}
+/* ERROR_CHECK_END */
 ;
 /* TODO ... */
 /*
 | sfc_network action
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | sfc_network error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "unexpected token after SFC network in sequencial function chart.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "unexpected token after SFC network in sequencial function chart.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@1), locl(@2), "no step name defined in initial step declaration.");
 	}
 | INITIAL_STEP error ':' action_association_list END_STEP
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid step name defined in initial step declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid step name defined in initial step declaration.");
 	 yyerrok;
 	}
 | INITIAL_STEP step_name action_association_list END_STEP
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "':' missing after step name in initial step declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "':' missing after step name in initial step declaration.");
 	}
 | INITIAL_STEP step_name error action_association_list END_STEP
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "expecting ':' after step name in initial step declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting ':' after step name in initial step declaration.");
 	 yyerrok;
 	}
 | INITIAL_STEP step_name ':' error END_STEP
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid action association list in initial step declaration.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid action association list in initial step declaration.");
 	 yyerrok;
 	}
 | INITIAL_STEP error END_STEP
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in initial step declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in initial step declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new step_c($2, $4, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | STEP ':' action_association_list END_STEP
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no step name defined in step declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no step name defined in step declaration.");
 	}
 | STEP error ':' action_association_list END_STEP
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid step name defined in step declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid step name defined in step declaration.");
 	 yyerrok;
 	}
 | STEP step_name action_association_list END_STEP
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "':' missing after step name in step declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "':' missing after step name in step declaration.");
 	}
 | STEP step_name error action_association_list END_STEP
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "expecting ':' after step name in step declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting ':' after step name in step declaration.");
 	 yyerrok;
 	}
 | STEP step_name ':' error END_STEP
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid action association list in step declaration.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid action association list in step declaration.");
 	 yyerrok;
 	}
 | STEP error END_STEP
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in step declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in step declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new action_association_list_c(locloc(@$));}
 | action_association_list action_association ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | action_association_list action_association error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at end of action association declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at end of action association declaration.");
 	 yyerrok;
 	}
 | action_association_list ';'
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after action association declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 action_name '(' {cmd_goto_sfc_qualifier_state()} action_qualifier {cmd_pop_state()} indicator_name_list ')'
 	{$$ = new action_association_c($1, $4, $6, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 /*| action_name '(' error indicator_name_list ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid qualifier defined in action association.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid qualifier defined in action association.");
 	 yyerrok;
 	}*/
 /* ERROR_CHECK_END */
 ;
 	{$$ = new indicator_name_list_c(locloc(@$));}
 | indicator_name_list ',' indicator_name
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN */
 | indicator_name_list indicator_name
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "',' missing at end of action association declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing at end of action association declaration.");
 	}
 | indicator_name_list ',' error
-	{$$ = NULL;
+	{$$ = $1;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after ',' in indicator list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new action_qualifier_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | timed_qualifier action_time
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "',' missing between timed qualifier and action time in action qualifier.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing between timed qualifier and action time in action qualifier.");
 	}
 | timed_qualifier ',' error
 	{$$ = NULL;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after ',' in action qualifier.");
 	 yyerrok;
 | '(' step_name_list ')'
 	{$$ = new steps_c(NULL, $2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | '(' step_name_list error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ')' at the end of step list in transition declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "expecting ')' at the end of step list in transition declaration.");
 	 yyerrok;
 	}
 | '(' error ')'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid step list in transition declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid step list in transition declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new step_name_list_c(locloc(@$)); $$->add_element($1); $$->add_element($3);}
 | step_name_list ',' step_name
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN */
 | step_name_list step_name
-	{$$ = NULL;
+	{$$ = $1;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "',' missing in step list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing in step list.");
 	}
 | step_name_list ',' error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid step name in step list.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ',' in step list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 END_TRANSITION
 	{$$ = new transition_c($2, $3, $5, $7, $9, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | TRANSITION error transition_priority FROM steps TO steps {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid transition name defined in transition declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid transition name defined in transition declaration.");
 	 yyerrok;
 	}
 | TRANSITION transition_name error FROM steps TO steps {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid transition priority defined in transition declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid transition priority defined in transition declaration.");
 	 yyerrok;
 	}
 | TRANSITION transition_priority FROM TO steps {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no origin step(s) defined in transition declaration.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no origin step(s) defined in transition declaration.");
 	}
 | TRANSITION transition_name transition_priority FROM TO steps {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@5), "no origin step(s) defined in transition declaration.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "no origin step(s) defined in transition declaration.");
 	}
 | TRANSITION transition_priority FROM error TO steps {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "invalid origin step(s) defined in transition declaration.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid origin step(s) defined in transition declaration.");
 	 yyerrok;
 	}
 | TRANSITION transition_name transition_priority FROM error TO steps {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@6), "invalid origin step(s) defined in transition declaration.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "invalid origin step(s) defined in transition declaration.");
 	 yyerrok;
 	}
 | TRANSITION transition_priority FROM steps steps {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@5), "'TO' missing between origin step(s) and destination step(s) in transition declaration.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "'TO' missing between origin step(s) and destination step(s) in transition declaration.");
 	}
 | TRANSITION transition_name transition_priority FROM steps steps {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@5), locl(@6), "'TO' missing between origin step(s) and destination step(s) in transition declaration.");
+	 print_err_msg(current_filename, locl(@5), locf(@6), "'TO' missing between origin step(s) and destination step(s) in transition declaration.");
 	}
 | TRANSITION transition_priority FROM steps error steps {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@6), "expecting 'TO' between origin step(s) and destination step(s) in transition declaration.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "expecting 'TO' between origin step(s) and destination step(s) in transition declaration.");
 	 yyerrok;
 	}
 | TRANSITION transition_name transition_priority FROM steps error steps {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@5), locl(@7), "expecting 'TO' between origin step(s) and destination step(s) in transition declaration.");
+	 print_err_msg(current_filename, locf(@6), locl(@6), "expecting 'TO' between origin step(s) and destination step(s) in transition declaration.");
 	 yyerrok;
 	}
 | TRANSITION transition_priority FROM steps TO {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@5), locl(@7), "no destination step(s) defined in transition declaration.");
+	 print_err_msg(current_filename, locl(@5), locf(@7), "no destination step(s) defined in transition declaration.");
 	}
 | TRANSITION transition_name transition_priority FROM steps TO {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@6), locl(@8), "no destination step(s) defined in transition declaration.");
+	 print_err_msg(current_filename, locl(@6), locf(@8), "no destination step(s) defined in transition declaration.");
 	}
 | TRANSITION transition_priority FROM steps TO error {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@5), locl(@8), "invalid destination step(s) defined in transition declaration.");
+	 print_err_msg(current_filename, locf(@6), locl(@6), "invalid destination step(s) defined in transition declaration.");
 	 yyerrok;
 	}
 | TRANSITION transition_name transition_priority FROM steps TO error {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@6), locl(@9), "invalid destination step(s) defined in transition declaration.");
+	 print_err_msg(current_filename, locf(@7), locl(@7), "invalid destination step(s) defined in transition declaration.");
 	 yyerrok;
 	}
 | TRANSITION transition_priority {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "no origin and destination step(s) defined in transition declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@4), "no origin and destination step(s) defined in transition declaration.");
 	}
 | TRANSITION transition_name transition_priority {cmd_goto_body_state();} transition_condition END_TRANSITION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "no origin and destination step(s) defined in transition declaration.");
+	 print_err_msg(current_filename, locl(@3), locf(@5), "no origin and destination step(s) defined in transition declaration.");
 	}
 | TRANSITION error END_TRANSITION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in transition declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in transition declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 transition_priority:
 /* empty */
 {$$ = NULL;}
 | '(' {cmd_goto_sfc_priority_state();} PRIORITY {cmd_pop_state();} ASSIGN integer ')'
 	{$$ = $6;}
+/* ERROR_CHECK_BEGIN */
+| '(' ASSIGN integer ')'
+	{$$ = NULL;
+	 yynerrs++;
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'PRIORITY' missing between '(' and ':=' in transition declaration with priority.");
+	}
+| '(' error ASSIGN integer ')'
+	{$$ = NULL;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting 'PRIORITY' between '(' and ':=' in transition declaration with priority.");
+	 yyerrok;
+	}
+//* ERROR_CHECK_END */
 ;
 transition_condition:
 ':' eol_list simple_instr_list
 	{$$ = new transition_condition_c(NULL, $2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | eol_list simple_instr_list
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "':' missing before IL condition in transition declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing before IL condition in transition declaration.");
 	}
 | ':' eol_list error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no instructions defined in IL condition of transition declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no instructions defined in IL condition of transition declaration.");
 	 yyerrok;
 	}
 | ASSIGN ';'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no expression defined in ST condition of transition declaration.");
+	 yynerrs++;
-	 yyerrok;
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no expression defined in ST condition of transition declaration.");
 	}
 | ASSIGN error ';'
 	{$$ = NULL;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression defined in ST condition of transition declaration.");
 	 yyerrok;
 	}
 | ASSIGN expression error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ';' after expression defined in ST condition of transition declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "expecting ';' after expression defined in ST condition of transition declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new action_c($2, $5, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | ACTION ':' {cmd_goto_body_state();} function_block_body END_ACTION
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no action name defined in action declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no action name defined in action declaration.");
 	}
 | ACTION error ':' {cmd_goto_body_state();} function_block_body END_ACTION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid action name defined in action declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid action name defined in action declaration.");
 	 yyerrok;
 	}
 | ACTION action_name {cmd_goto_body_state();} function_block_body END_ACTION
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "':' missing after action name in action declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@4), "':' missing after action name in action declaration.");
 	}
 | ACTION action_name ':' END_ACTION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no body defined in action declaration.");
+	 yynerrs++;
-	 yyerrok;
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no body defined in action declaration.");
 	}
 | ACTION error END_ACTION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in action declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in action declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 optional_access_declarations
 optional_instance_specific_initializations
 END_CONFIGURATION
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no configuration name defined in configuration declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no configuration name defined in configuration declaration.");
 	}
 | CONFIGURATION
 optional_global_var_declarations
 resource_declaration_list
 optional_access_declarations
 optional_instance_specific_initializations
 END_CONFIGURATION
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no configuration name defined in configuration declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no configuration name defined in configuration declaration.");
 	}
 | CONFIGURATION error
 optional_global_var_declarations
 single_resource_declaration
 {variable_name_symtable.pop();}
 optional_access_declarations
 optional_instance_specific_initializations
 END_CONFIGURATION
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid configuration name defined in configuration declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid configuration name defined in configuration declaration.");
 	 yyerrok;
 	}
 | CONFIGURATION error
 optional_global_var_declarations
 resource_declaration_list
 optional_access_declarations
 optional_instance_specific_initializations
 END_CONFIGURATION
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid configuration name defined in configuration declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid configuration name defined in configuration declaration.");
 	 yyerrok;
 	}
 | CONFIGURATION configuration_name
 optional_global_var_declarations
 optional_access_declarations
 optional_instance_specific_initializations
 END_CONFIGURATION
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no resource(s) defined in configuration declaration.");
+	 yynerrs++;
-	 yyerrok;
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no resource(s) defined in configuration declaration.");
 	}
 | CONFIGURATION configuration_name
 optional_global_var_declarations
 error
 optional_access_declarations
 optional_instance_specific_initializations
 END_CONFIGURATION
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "invalid resource(s) defined in configuration declaration.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid resource(s) defined in configuration declaration.");
 	 yyerrok;
 	}
 | CONFIGURATION error END_CONFIGURATION
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in configuration declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in configuration declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new resource_declaration_list_c(locloc(@$)); $$->add_element($1);}
 | resource_declaration_list resource_declaration
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | resource_declaration_list error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "unexpected token after resource declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after resource declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 optional_global_var_declarations
 single_resource_declaration
 END_RESOURCE
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "no resource name defined in resource declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@3), "no resource name defined in resource declaration.");
 	}
 | RESOURCE error END_RESOURCE
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in resource declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in resource declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new task_configuration_list_c(locloc(@$));}
 | task_configuration_list task_configuration ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | task_configuration_list task_configuration error
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at the end of task configuration in resource declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at the end of task configuration in resource declaration.");
 	 yyerrok;
 	}
 | task_configuration_list ';'
-{$$ = NULL;
+{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after task configuration in resource declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new program_configuration_list_c(locloc(@$)); $$->add_element($1);}
 | program_configuration_list program_configuration ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | program_configuration error
-{$$ = NULL;
+{$$ = new program_configuration_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at the end of program configuration in resource declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at the end of program configuration in resource declaration.");
 	 yyerrok;
 	}
 | program_configuration_list program_configuration error
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at the end of program configuration in resource declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at the end of program configuration in resource declaration.");
 	 yyerrok;
 	}
 | program_configuration_list error ';'
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid program configuration in resource declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid program configuration in resource declaration.");
 	 yyerrok;
 	}
 | program_configuration_list ';'
-{$$ = NULL;
+{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after program configuration in resource declaration.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = NULL;}
 // ERROR_CHECK_BEGIN //
 | VAR_ACCESS END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no variable declared in access variable(s) declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no variable declared in access variable(s) declaration.");
 	}
 | VAR_ACCESS error access_declaration_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'VAR_ACCESS' in access variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'VAR_ACCESS' in access variable(s) declaration.");
 	 yyerrok;
 	}
 | VAR_ACCESS error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in access variable(s) declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in access variable(s) declaration.");
 	 yyerrok;
 	}
 // ERROR_CHECK_END //
 ;
 // helper symbol for access_declarations //
 access_declaration_list:
 access_declaration ';'
 | access_declaration_list access_declaration ';'
 // ERROR_CHECK_BEGIN //
+| error ';'
+{$$ = // create a new list //;
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid access variable declaration.");
+	 yyerrok;
+	}
 | access_declaration error
-{$$ = NULL;
+{$$ = // create a new list //;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at the end of access variable declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at the end of access variable declaration.");
 	 yyerrok;
 	}
 | access_declaration_list access_declaration error
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at the end of access variable declaration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at the end of access variable declaration.");
 	 yyerrok;
 	}
 | access_declaration_list error ';'
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid access variable declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid access variable declaration.");
 	 yyerrok;
 	}
 | access_declaration_list ';'
-{$$ = NULL;
+{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after access variable declaration.");
 	}
 // ERROR_CHECK_END //
 ;
 	{$$ = new task_configuration_c($2, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | TASK task_initialization
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no task name defined in task declaration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no task name defined in task declaration.");
 	}
 | TASK error task_initialization
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid task name defined in task declaration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid task name defined in task declaration.");
 	 yyerrok;
 	}
 | TASK task_name error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid task initialization in task declaration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid task initialization in task declaration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $4;}
 /* ERROR_CHECK_BEGIN */
 | SINGLE {cmd_pop_state();} data_source ',' {cmd_goto_task_init_state();}
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "':=' missing after 'SINGLE' in task initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@3), "':=' missing after 'SINGLE' in task initialization.");
 	}
 | SINGLE error {cmd_pop_state();} data_source ',' {cmd_goto_task_init_state();}
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@4), "expecteing ':=' after 'SINGLE' in task initialization.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ':=' after 'SINGLE' in task initialization.");
 	 yyerrok;
 	}
 | SINGLE ASSIGN {cmd_pop_state();} ',' {cmd_goto_task_init_state();}
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "no data source defined in 'SINGLE' statement of task initialization.");
+	 print_err_msg(current_filename, locl(@2), locf(@4), "no data source defined in 'SINGLE' statement of task initialization.");
 	}
 | SINGLE ASSIGN {cmd_pop_state();} error ',' {cmd_goto_task_init_state();}
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@5), "invalid data source defined in 'SINGLE' statement of task initialization.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid data source defined in 'SINGLE' statement of task initialization.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $4;}
 /* ERROR_CHECK_BEGIN */
 | INTERVAL {cmd_pop_state();} data_source ',' {cmd_goto_task_init_state();}
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "':=' missing after 'INTERVAL' in task initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@3), "':=' missing after 'INTERVAL' in task initialization.");
 	}
 | INTERVAL error {cmd_pop_state();} data_source ',' {cmd_goto_task_init_state();}
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@4), "expecting ':=' after 'INTERVAL' in task initialization.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ':=' after 'INTERVAL' in task initialization.");
 	 yyerrok;
 	}
 | INTERVAL ASSIGN {cmd_pop_state();} ',' {cmd_goto_task_init_state();}
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "no data source defined in 'INTERVAL' statement of task initialization.");
+	 print_err_msg(current_filename, locl(@2), locf(@4), "no data source defined in 'INTERVAL' statement of task initialization.");
 	}
 | INTERVAL ASSIGN {cmd_pop_state();} error ',' {cmd_goto_task_init_state();}
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@5), "invalid data source defined in 'INTERVAL' statement of task initialization.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid data source defined in 'INTERVAL' statement of task initialization.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $4;}
 /* ERROR_CHECK_BEGIN */
 | PRIORITY {cmd_pop_state();} integer
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "':=' missing after 'PRIORITY' in task initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@3), "':=' missing after 'PRIORITY' in task initialization.");
 	}
 | PRIORITY error {cmd_pop_state();} integer
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@4), "expecting ':=' after 'PRIORITY' in task initialization.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ':=' after 'PRIORITY' in task initialization.");
 	 yyerrok;
 	}
 | PRIORITY ASSIGN {cmd_pop_state();} error
 {$$ = NULL;
-	 yynerrs++;
+	 print_err_msg(current_filename, locl(@2), locf(@4), "no priority number defined in 'PRIORITY' statement of task initialization.");
-	 print_err_msg(current_filename, locf(@2), locl(@2), "no priority number defined in 'PRIORITY' statement of task initialization.");
+	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	}
 /* ERROR_CHECK_BEGIN */
 | PROGRAM program_name optional_task_name ':' identifier optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown program type name after ':' in program configuration.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "unknown program type name after ':' in program configuration.");
 	}
 | PROGRAM RETAIN program_name optional_task_name ':' identifier optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unknown program type name after ':' in program configuration.");
+	 print_err_msg(current_filename, locf(@6), locl(@6), "unknown program type name after ':' in program configuration.");
 	}
 | PROGRAM NON_RETAIN program_name optional_task_name ':' identifier optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unknown program type name after ':' in program configuration.");
+	 print_err_msg(current_filename, locf(@6), locl(@6), "unknown program type name after ':' in program configuration.");
 	}
 | PROGRAM error program_name optional_task_name ':' prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'PROGRAM' in program configuration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'PROGRAM' in program configuration.");
 	 yyerrok;
 	}
 | PROGRAM RETAIN error program_name optional_task_name ':' prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'RETAIN' in retentive program configuration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'RETAIN' in retentive program configuration.");
 	 yyerrok;
 	}
 | PROGRAM NON_RETAIN error program_name optional_task_name ':' prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "unexpected token after 'NON_RETAIN' in non-retentive program configuration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "unexpected token after 'NON_RETAIN' in non-retentive program configuration.");
 	 yyerrok;
 	}
 | PROGRAM optional_task_name ':' prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no program name defined in program configuration.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no program name defined in program configuration.");
 	}
 | PROGRAM RETAIN optional_task_name ':' prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no program name defined in retentive program configuration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no program name defined in retentive program configuration.");
 	}
 | PROGRAM NON_RETAIN optional_task_name ':' prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "no program name defined in non-retentive program configuration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no program name defined in non-retentive program configuration.");
 	}
 | PROGRAM error optional_task_name ':' prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "no program name defined in program configuration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "no program name defined in program configuration.");
 	 yyerrok;
 	}
 | PROGRAM RETAIN error optional_task_name ':' prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "no program name defined in retentive program configuration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "no program name defined in retentive program configuration.");
 	 yyerrok;
 	}
 | PROGRAM NON_RETAIN error optional_task_name ':' prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "no program name defined in non-retentive program configuration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "no program name defined in non-retentive program configuration.");
 	 yyerrok;
 	}
 | PROGRAM program_name optional_task_name prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "':' missing after program name or optional task name in program configuration.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "':' missing after program name or optional task name in program configuration.");
 	}
 | PROGRAM RETAIN program_name optional_task_name prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@5), "':' missing after program name or optional task name in program configuration.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "':' missing after program name or optional task name in program configuration.");
 	}
 | PROGRAM NON_RETAIN program_name optional_task_name prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@5), "':' missing after program name or optional task name in program configuration.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "':' missing after program name or optional task name in program configuration.");
 	}
 | PROGRAM program_name optional_task_name error prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "expecting ':' after program name or optional task name in program configuration.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "expecting ':' after program name or optional task name in program configuration.");
 	 yyerrok;
 	}
 | PROGRAM RETAIN program_name optional_task_name error prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@6), "expecting ':' after program name or optional task name in program configuration.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "expecting ':' after program name or optional task name in program configuration.");
 	 yyerrok;
 	}
 | PROGRAM NON_RETAIN program_name optional_task_name error prev_declared_program_type_name optional_prog_conf_elements
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@6), "expecting ':' after program name or optional task name in program configuration.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "expecting ':' after program name or optional task name in program configuration.");
 	 yyerrok;
 	}
 | PROGRAM program_name optional_task_name ':' optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@4), locl(@5), "no program type defined in program configuration.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "no program type defined in program configuration.");
 	}
 | PROGRAM RETAIN program_name optional_task_name ':' optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@5), locl(@6), "no program type defined in program configuration.");
+	 print_err_msg(current_filename, locl(@5), locf(@6), "no program type defined in program configuration.");
 	}
 | PROGRAM NON_RETAIN program_name optional_task_name ':' optional_prog_conf_elements
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@5), locl(@6), "no program type defined in program configuration.");
+	 print_err_msg(current_filename, locl(@5), locf(@6), "no program type defined in program configuration.");
 }
 /* ERROR_CHECK_END */
 ;
 // helper symbol for program_configuration //
 | WITH task_name
 	{$$ = $2;}
 /* ERROR_CHECK_BEGIN */
 | WITH error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid tack name in optional task name of program configuration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid tack name in optional task name of program configuration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | '(' prog_conf_elements ')'
 	{$$ = $2;}
 /* ERROR_CHECK_BEGIN */
 | '(' error ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid program configuration elements in program configuration.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid program configuration elements in program configuration.");
 	 yyerrok;
 	}
 | '(' prog_conf_elements error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "')' missing at the end of program configuration elements in program configuration.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "')' missing at the end of program configuration elements in program configuration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN */
 | prog_conf_elements prog_conf_element
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "',' missing in program configuration elements list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing in program configuration elements list.");
 	}
 | prog_conf_elements ',' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value for program configuration element in program configuration list.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value for program configuration element in program configuration list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 any_identifier WITH task_name
 	{$$ = new fb_task_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | any_identifier WITH error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid task name in function block configuration.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid task name in function block configuration.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new prog_cnxn_sendto_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | any_symbolic_variable constant
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':=' missing between parameter and value in program configuration element.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing between parameter and value in program configuration element.");
 	}
 | any_symbolic_variable enumerated_value
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':=' missing between parameter and value in program configuration element.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing between parameter and value in program configuration element.");
 	}
 | any_symbolic_variable data_sink
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':=' or '=>' missing between parameter and variable in program configuration element.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' or '=>' missing between parameter and variable in program configuration element.");
 	}
 | any_symbolic_variable error prog_data_source
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ':=' or '=>' after parameter in program configuration element.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "expecting ':=' or '=>' after parameter in program configuration element.");
 	 yyerrok;
 	}
 | any_symbolic_variable ASSIGN error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid value or variable in program configuration assignment element.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid value or variable in program configuration assignment element.");
 	 yyerrok;
 	}
 | any_symbolic_variable SENDTO error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid variable in program configuration sendto element.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid variable in program configuration sendto element.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new instance_specific_initializations_c($2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | VAR_CONFIG END_VAR
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no variable declared in configuration variable(s) initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no variable declared in configuration variable(s) initialization.");
 	}
 | VAR_CONFIG error instance_specific_init_list END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unexpected token after 'VAR_CONFIG' in configuration variable(s) initialization.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected token after 'VAR_CONFIG' in configuration variable(s) initialization.");
 	 yyerrok;
 	}
 | VAR_CONFIG error END_VAR
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in configuration variable(s) initialization.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in configuration variable(s) initialization.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 instance_specific_init ';'
 	{$$ = new instance_specific_init_list_c(locloc(@$)); $$->add_element($1);}
 | instance_specific_init_list instance_specific_init ';'
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
+| error ';'
+{$$ = new instance_specific_init_list_c(locloc(@$));
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid configuration variable initialization.");
+	 yyerrok;
+	}
 | instance_specific_init error
-{$$ = NULL;
+{$$ = new instance_specific_init_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at the end of configuration variable initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at the end of configuration variable initialization.");
 	 yyerrok;
 	}
 | instance_specific_init_list instance_specific_init error
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at the end of configuration variable initialization.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at the end of configuration variable initialization.");
 	 yyerrok;
 	}
 | instance_specific_init_list error ';'
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid configuration variable initialization.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid configuration variable initialization.");
 	 yyerrok;
 	}
 | instance_specific_init_list ';'
-{$$ = NULL;
+{$$ = $1;
 	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after configuration variable initialization.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new fb_initialization_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | function_block_type_name structure_initialization
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "':=' missing between function block name and initialization in function block initialization.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':=' missing between function block name and initialization in function block initialization.");
 	}
 | function_block_type_name error structure_initialization
 {$$ = NULL;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ':=' after function block name in function block initialization.");
 	 yyerrok;
 	{$$ = $1; $$->add_element($2);}
 | instruction_list pragma
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | instruction_list error
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid IL instruction.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid IL instruction.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | label ':' il_incomplete_instruction eol_list
 	{$$ = new il_instruction_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | error eol_list
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid IL instruction.");
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid IL instruction.");
 	 yyerrok;
 	}
 | il_incomplete_instruction error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "EOL missing at the end of IL instruction.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "EOL missing at the end of IL instruction.");
 	 yyerrok;
 	}
 | error ':' il_incomplete_instruction eol_list
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid label in IL instruction.");
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid label in IL instruction.");
 	 yyerrok;
 	}
 | label il_incomplete_instruction eol_list
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':' missing after label in IL instruction.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing after label in IL instruction.");
 	}
 | label error il_incomplete_instruction eol_list
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting ':' after label in IL instruction.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ':' after label in IL instruction.");
 	 yyerrok;
 	}
 | label ':' error eol_list
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "invalid IL instruction.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid IL instruction.");
 	 yyerrok;
 	}
 | label ':' il_incomplete_instruction error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "EOL missing at the end of IL instruction.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "EOL missing at the end of IL instruction.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | il_expr_operator_clash_eol_list simple_instr_list ')'
 	{$$ = new il_expression_c($1, NULL, $2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | il_expr_operator_noclash '(' eol_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "')' missing at the end of IL expression.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "')' missing at the end of IL expression.");
 	 yyerrok;
 	}
 | il_expr_operator_noclash '(' il_operand eol_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@4), "')' missing at the end of IL expression.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "')' missing at the end of IL expression.");
 	 yyerrok;
 	}
 | il_expr_operator_noclash '(' eol_list simple_instr_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@4), "')' missing at the end of IL expression.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "')' missing at the end of IL expression.");
 	 yyerrok;
 	}
 | il_expr_operator_noclash '(' il_operand eol_list simple_instr_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@5), locl(@5), "')' missing at the end of IL expression.");
+	 print_err_msg(current_filename, locl(@5), locf(@6), "')' missing at the end of IL expression.");
 	 yyerrok;
 	}
 | il_expr_operator_clash '(' il_operand eol_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@4), "')' missing at the end of IL expression.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "')' missing at the end of IL expression.");
 	 yyerrok;
 	}
 | il_expr_operator_clash '(' il_operand eol_list simple_instr_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@5), locl(@5), "')' missing at the end of IL expression.");
+	 print_err_msg(current_filename, locl(@5), locf(@6), "')' missing at the end of IL expression.");
 	 yyerrok;
 	}
 | il_expr_operator_clash_eol_list simple_instr_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "')' missing at the end of IL expression.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "')' missing at the end of IL expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 il_jump_operator label
 	{$$ = new il_jump_operation_c($1, $2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | il_jump_operator error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid label defined in IL jump operation.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid label defined in IL jump operation.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')'
 	{$$ = new il_fb_call_c($1, $2, NULL, $5, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | il_call_operator error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid function block name defined in IL function block call.");
 	 yyerrok;
 	}
 | il_call_operator '(' ')'
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no function block name defined in IL function block call.");
 	}
 | il_call_operator '(' eol_list ')'
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no function block name defined in IL function block call.");
 	}
 | il_call_operator '(' il_operand_list ')'
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no function block name defined in IL function block call.");
 	}
 | il_call_operator '(' eol_list il_param_list ')'
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no function block name defined in IL function block call.");
 	}
 | il_call_operator error '(' ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid function block name defined in IL function block call.");
 	 yyerrok;
 	}
 | il_call_operator error '(' eol_list ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid function block name defined in IL function block call.");
 	 yyerrok;
 	}
 | il_call_operator error '(' il_operand_list ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid function block name defined in IL function block call.");
 	 yyerrok;
 	}
 | il_call_operator error '(' eol_list il_param_list ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid function block name defined in IL function block call.");
 	 yyerrok;
 	}
 | il_call_operator prev_declared_fb_name ')'
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "'(' missing after function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "'(' missing after function block name defined in IL function block call.");
 	}
 | il_call_operator prev_declared_fb_name il_operand_list ')'
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "'(' missing after function block name defined in IL function block call.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "'(' missing after function block name defined in IL function block call.");
 	}
 | il_call_operator prev_declared_fb_name '(' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "')' missing at the end of IL function block call.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "')' missing at the end of IL function block call.");
 	 yyerrok;
 	}
 | il_call_operator prev_declared_fb_name '(' eol_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "')' missing at the end of IL function block call.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "')' missing at the end of IL function block call.");
 	 yyerrok;
 	}
 | il_call_operator prev_declared_fb_name '(' il_operand_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "')' missing at the end of IL function block call.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "')' missing at the end of IL function block call.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | il_expr_operator_clash_eol_list il_param_list ')'
 	{$$ = new il_formal_funct_call_c(il_operator_c_2_identifier_c($1), $2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | function_name_no_clashes '(' eol_list error ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "invalid parameter list defined in IL formal function call.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid parameter list defined in IL formal function call.");
 	 yyerrok;
 	}
 | function_name_simpleop_clashes '(' eol_list error ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "invalid parameter list defined in IL formal function call.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid parameter list defined in IL formal function call.");
 	 yyerrok;
 	}
 | il_expr_operator_clash_eol_list error ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid parameter list defined in IL formal function call.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid parameter list defined in IL formal function call.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 il_expr_operator_clash '(' eol_list
 	{$$ = $1;}
 /* ERROR_CHECK_BEGIN */
 | il_expr_operator_clash '(' error
 {$$ = NULL;
-	 yynerrs++;
+	 print_err_msg(current_filename, locl(@2), locf(@3), "EOL missing after '(' in IL instruction.");
-	 print_err_msg(current_filename, locf(@1), locl(@2), "EOL missing after '(' in IL instruction.");
+	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN */
 | il_operand_list2 il_operand
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "',' missing in IL operand list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing in IL operand list.");
 	}
 | il_formal_funct_call error il_operand
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting ',' in IL operand list.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ',' in IL operand list.");
 	 yyerrok;
 	}
 | il_formal_funct_call ',' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid operand in IL operand list.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid operand in IL operand list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | il_expression eol_list
 | il_formal_funct_call eol_list
 /* ERROR_CHECK_BEGIN */
 | il_expression error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "EOL missing after expression IL instruction.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "EOL missing after expression IL instruction.");
 	 yyerrok;
 	}
 | il_formal_funct_call error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "EOL missing after formal function call IL instruction.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "EOL missing after formal function call IL instruction.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $1; $$->add_element($2);}
 | il_param_last_instruction
 	{$$ = new il_param_list_c(locloc(@$)); $$->add_element($1);}
 /* ERROR_CHECK_BEGIN */
 | il_param_instruction_list error
-{$$ = NULL;
+{$$ = $1;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid parameter assignment in parameter assignment list.");
 	 yyerrok;
 	}
 | il_param_last_instruction il_param_last_instruction
-{$$ = NULL;
+{$$ = new il_param_list_c(locloc(@$));
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "',' missing at the end of parameter assignment in parameter assignment list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing at the end of parameter assignment in parameter assignment list.");
 	}
 | il_param_instruction_list il_param_last_instruction il_param_last_instruction
-{$$ = NULL;
+{$$ = $1;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "',' missing at the end of parameter assignment in parameter assignment list.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "',' missing at the end of parameter assignment in parameter assignment list.");
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new il_param_list_c(locloc(@$)); $$->add_element($1);}
 | il_param_instruction_list il_param_instruction
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | il_param_last_instruction il_param_instruction
-{$$ = NULL;
+{$$ = new il_param_list_c(locloc(@$));
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "',' missing at the end of parameter assignment in parameter assignment list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "',' missing at the end of parameter assignment in parameter assignment list.");
 	}
 | il_param_instruction_list il_param_last_instruction il_param_instruction
-{$$ = NULL;
+{$$ = $1;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "',' missing at the end of parameter assignment in parameter assignment list.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "',' missing at the end of parameter assignment in parameter assignment list.");
 	}
 /* ERROR_CHECK_END */
 ;
 il_param_assignment ',' eol_list
 | il_param_out_assignment ',' eol_list
 /* ERROR_CHECK_BEGIN */
 | il_param_assignment ',' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "EOL missing at the end of parameter assignment in parameter assignment list.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "EOL missing at the end of parameter assignment in parameter assignment list.");
 	 yyerrok;
 	}
 | il_param_out_assignment ',' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "EOL missing at the end of parameter out assignment in parameter assignment list.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "EOL missing at the end of parameter out assignment in parameter assignment list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 il_param_assignment eol_list
 | il_param_out_assignment eol_list
 /* ERROR_CHECK_BEGIN */
 | il_param_assignment error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "EOL missing at the end of last parameter assignment in parameter assignment list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "EOL missing at the end of last parameter assignment in parameter assignment list.");
 	 yyerrok;
 	}
 | il_param_out_assignment error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "EOL missing at the end of last parameter out assignment in parameter assignment list.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "EOL missing at the end of last parameter out assignment in parameter assignment list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | il_assign_operator '(' eol_list simple_instr_list ')'
 	{$$ = new il_param_assignment_c($1, NULL, $4, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | error il_operand
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid operator in parameter assignment.");
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid operator in parameter assignment.");
 	 yyerrok;
 	}
 | error '(' eol_list simple_instr_list ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid operator in parameter assignment.");
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid operator in parameter assignment.");
 	 yyerrok;
 	}
 | il_assign_operator error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid operand defined in parameter assignment.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "invalid operand defined in parameter assignment.");
 	 yyerrok;
 	}
-| il_assign_operator '(' ')'
+| il_assign_operator '(' eol_list ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "no instruction list defined in parameter assignment.");
+	 yynerrs++;
-	 yyerrok;
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no instruction list defined in parameter assignment.");
 	}
-| il_assign_operator '(' error ')'
+| il_assign_operator '(' eol_list error ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid instruction list defined in parameter assignment.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid instruction list defined in parameter assignment.");
 	 yyerrok;
 	}
 | il_assign_operator '(' eol_list simple_instr_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "')' missing at the end of instruction list defined in parameter assignment.");
+	 print_err_msg(current_filename, locl(@4), locf(@5), "')' missing at the end of instruction list defined in parameter assignment.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 il_assign_out_operator variable
 	{$$ = new il_param_out_assignment_c($1, $2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | il_assign_out_operator error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid variable defined in parameter out assignment.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid variable defined in parameter out assignment.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 /*  variable_name ASSIGN */
 any_identifier ASSIGN
 /* ERROR_CHECK_BEGIN */
 | error ASSIGN
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid parameter defined in parameter assignment.");
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid parameter defined in parameter assignment.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | NOT sendto_identifier SENDTO
 	{$$ = new il_assign_out_operator_c(new not_paramassign_c(locloc(@1)), $2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | error SENDTO
 {$$ = NULL;
+	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid parameter defined in parameter out assignment.");
+	 yyerrok;
+	}
+| NOT SENDTO
+{$$ = NULL;
+	 yynerrs++;
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no parameter defined in parameter out assignment.");
+	}
+| NOT error SENDTO
+{$$ = NULL;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid parameter defined in parameter out assignment.");
-	 yyerrok;
-	}
-| NOT SENDTO
-{$$ = NULL;
-	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no paramter defined in parameter out assignment.");
-	}
-| NOT error SENDTO
-{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid parameter defined in parameter out assignment.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | expression OR xor_expression
 	{$$ = new or_expression_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | expression OR error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after 'OR' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after 'OR' in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | xor_expression XOR and_expression
 	{$$ = new xor_expression_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | xor_expression XOR error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after 'XOR' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after 'XOR' in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | and_expression AND2 comparison
 	{$$ = new and_expression_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | and_expression '&' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '&' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '&' in ST expression.");
 	 yyerrok;
 	}
 | and_expression AND error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after 'AND' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after 'AND' in ST expression.");
 	 yyerrok;
 	}
 | and_expression AND2 error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '&' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '&' in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | comparison OPER_NE equ_expression
 	{$$ = new notequ_expression_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | comparison '=' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '=' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '=' in ST expression.");
 	 yyerrok;
 	}
 | comparison OPER_NE error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '<>' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '<>' in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | equ_expression OPER_GE add_expression
 	{$$ = new ge_expression_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | equ_expression '<' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '<' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '<' in ST expression.");
 	 yyerrok;
 	}
 | equ_expression '>' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '>' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '>' in ST expression.");
 	 yyerrok;
 	}
 | equ_expression OPER_LE error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '<=' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '<=' in ST expression.");
 	 yyerrok;
 	}
 | equ_expression OPER_GE error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '>=' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '>=' in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | add_expression '-' term
 	{$$ = new sub_expression_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | add_expression '+' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '+' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '+' in ST expression.");
 	 yyerrok;
 	}
 | add_expression '-' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '-' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '-' in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | term MOD power_expression
 	{$$ = new mod_expression_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | term '*' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '*' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '*' in ST expression.");
 	 yyerrok;
 	}
 | term '/' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '/' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '/' in ST expression.");
 	 yyerrok;
 	}
 | term MOD error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after 'MOD' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after 'MOD' in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | power_expression OPER_EXP unary_expression
 	{$$ = new power_expression_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | power_expression OPER_EXP error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '**' in ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after '**' in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | NOT primary_expression
 	{$$ = new not_expression_c($2, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | '-' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid expression after '-' in ST expression.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after '-' in ST expression.");
 	 yyerrok;
 	}
 | NOT error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid expression after 'NOT' in ST expression.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid expression after 'NOT' in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $2;}
 |  function_invocation
 /* ERROR_CHECK_BEGIN */
 | '(' expression error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "')' missing at the end of expression in ST expression.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "')' missing at the end of expression in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new function_invocation_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | function_name_no_NOT_clashes param_assignment_formal_list ')'
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "'(' missing after function name in ST expression.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'(' missing after function name in ST expression.");
 	}
 | function_name_no_NOT_clashes error param_assignment_formal_list ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '(' after function name in ST expression.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '(' after function name in ST expression.");
 	 yyerrok;
 	}
 | function_name_no_NOT_clashes error param_assignment_nonformal_list ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting '(' after function name in ST expression.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '(' after function name in ST expression.");
 	 yyerrok;
 	}
 | function_name_no_NOT_clashes '(' ')'
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "no parameter defined in function invocation of ST expression.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "no parameter defined in function invocation of ST expression.");
 	}
 | function_name_no_NOT_clashes '(' error ')'
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid parameter(s) defined in function invocation of ST expression.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid parameter(s) defined in function invocation of ST expression.");
 	 yyerrok;
 	}
 | function_name_no_NOT_clashes '(' param_assignment_formal_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "')' missing at the end of function invocation in ST expression.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "')' missing at the end of function invocation in ST expression.");
 	 yyerrok;
 	}
 | function_name_no_NOT_clashes '(' param_assignment_nonformal_list error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "')' missing at the end of function invocation in ST expression.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "')' missing at the end of function invocation in ST expression.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = $1; $$->add_element($2);}
 | statement_list pragma
 	{$$ = $1; $$->add_element($2);}
 /* ERROR_CHECK_BEGIN */
 | statement error
-	{$$ = NULL;
+	{$$ = new statement_list_c(locloc(@$));
-	 print_err_msg(current_filename, locf(@1), locl(@1), "';' missing at the end of statement in ST statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "';' missing at the end of statement in ST statement.");
 	 yyerrok;
 	}
 | statement_list statement error
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "';' missing at the end of statement in ST statement.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "';' missing at the end of statement in ST statement.");
 	 yyerrok;
 	}
 | statement_list error ';'
-	{$$ = NULL;
+	{$$ = $1;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid statement in ST statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid statement in ST statement.");
 	 yyerrok;
 	}
 | statement_list ';'
-	{$$ = NULL;
+	{$$ = $1;
+	 yynerrs++;
 	 print_err_msg(current_filename, locf(@2), locl(@2), "unexpected ';' after statement in ST statement.");
-	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 variable ASSIGN expression
 	{$$ = new assignment_statement_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | variable ASSIGN error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid expression after ':=' in ST assignment statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression after ':=' in ST assignment statement.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new fb_invocation_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | prev_declared_fb_name ')'
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "'(' missing after function block name in ST statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'(' missing after function block name in ST statement.");
 	}
 | prev_declared_fb_name param_assignment_formal_list ')'
 	{$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "'(' missing after function block name in ST statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "'(' missing after function block name in ST statement.");
 	}
 | prev_declared_fb_name error ')'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "expecting '(' after function block name in ST statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '(' after function block name in ST statement.");
 	 yyerrok;
 	}
 | prev_declared_fb_name error param_assignment_formal_list ')'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "expecting '(' after function block name in ST statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '(' after function block name in ST statement.");
 	 yyerrok;
 	}
 | prev_declared_fb_name error param_assignment_nonformal_list ')'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "expecting '(' after function block name in ST statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting '(' after function block name in ST statement.");
 	 yyerrok;
 	}
 | prev_declared_fb_name '(' error ')'
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "invalid parameter list in function block invocation in ST statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid parameter list in function block invocation in ST statement.");
 	 yyerrok;
 	}
 | prev_declared_fb_name '(' error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "')' missing after parameter list of function block invocation in ST statement.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "')' missing after parameter list of function block invocation in ST statement.");
 	 yyerrok;
 	}
 | prev_declared_fb_name '(' param_assignment_formal_list error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "')' missing after parameter list of function block invocation in ST statement.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "')' missing after parameter list of function block invocation in ST statement.");
 	 yyerrok;
 	}
 | prev_declared_fb_name '(' param_assignment_nonformal_list error
 	{$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@1), "')' missing after parameter list of function block invocation in ST statement.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "')' missing after parameter list of function block invocation in ST statement.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new param_assignment_list_c(locloc(@$)); $$->add_element($1);}
 | param_assignment_formal_list ',' param_assignment_formal
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN */
 | param_assignment_formal_list error param_assignment_formal
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "expecting ',' in ST parameter assignment list.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "expecting ',' in ST parameter assignment list.");
 	 yyerrok;
 	}
 | param_assignment_formal_list ',' error
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid parameter assignment in ST parameter assignment list.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid parameter assignment in ST parameter assignment list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new param_assignment_list_c(locloc(@$)); $$->add_element($1);}
 | param_assignment_nonformal_list ',' param_assignment_nonformal
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN */
 | param_assignment_nonformal_list ',' error
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "invalid parameter assignment in ST parameter assignment list.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid parameter assignment in ST parameter assignment list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 | NOT sendto_identifier SENDTO variable
 	{$$ = new output_variable_param_assignment_c(new not_paramassign_c(locloc(@$)),$2, $4, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | any_identifier ASSIGN error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "invalid expression in ST formal parameter assignment.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression in ST formal parameter assignment.");
 	 yyerrok;
 	}
 | sendto_identifier SENDTO error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "invalid expression in ST formal parameter out assignment.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid expression in ST formal parameter out assignment.");
 	 yyerrok;
 	}
 | NOT SENDTO variable
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no parameter name defined in ST formal parameter out negated assignment.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no parameter name defined in ST formal parameter out negated assignment.");
 	}
 | NOT error SENDTO variable
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "invalid parameter name defined in ST formal parameter out negated assignment.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid parameter name defined in ST formal parameter out negated assignment.");
 	 yyerrok;
 	}
 | NOT sendto_identifier SENDTO error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "invalid expression in ST formal parameter out negated assignment.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid expression in ST formal parameter out negated assignment.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new if_statement_c($2, $4, $5, $7, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | IF THEN statement_list elseif_statement_list END_IF
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no test expression defined in ST 'IF' statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no test expression defined in ST 'IF' statement.");
 	}
 | IF THEN statement_list elseif_statement_list ELSE statement_list END_IF
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no test expression defined in ST 'IF' statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no test expression defined in ST 'IF' statement.");
 	}
 | IF error THEN statement_list elseif_statement_list END_IF
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid test expression defined for ST 'IF' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid test expression defined for ST 'IF' statement.");
 	 yyerrok;
 	}
 | IF error THEN statement_list elseif_statement_list ELSE statement_list END_IF
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid test expression defined for ST 'IF' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid test expression defined for ST 'IF' statement.");
 	 yyerrok;
 	}
 | IF expression error statement_list elseif_statement_list END_IF
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "expecting 'THEN' after test expression in ST 'IF' statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting 'THEN' after test expression in ST 'IF' statement.");
 	 yyerrok;
 	}
 | IF expression error statement_list elseif_statement_list ELSE statement_list END_IF
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "expecting 'THEN' after test expression in ST 'IF' statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting 'THEN' after test expression in ST 'IF' statement.");
 	 yyerrok;
 	}
 | IF expression THEN elseif_statement_list END_IF
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no statement defined after 'THEN' in ST 'IF' statement.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no statement defined after 'THEN' in ST 'IF' statement.");
 	}
 | IF expression THEN elseif_statement_list ELSE statement_list END_IF
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no statement defined after 'THEN' in ST 'IF' statement.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no statement defined after 'THEN' in ST 'IF' statement.");
 	}
 | IF expression THEN statement_list elseif_statement_list ELSE END_IF
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@6), locl(@7), "no statement defined after 'ELSE' in ST 'IF' statement.");
+	 print_err_msg(current_filename, locl(@6), locf(@7), "no statement defined after 'ELSE' in ST 'IF' statement.");
 	}
 | IF expression THEN statement_list elseif_statement_list ELSE error END_IF
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@6), locl(@8), "invalid statement defined after 'ELSE' in ST 'IF' statement.");
+	 print_err_msg(current_filename, locf(@7), locl(@7), "invalid statement defined after 'ELSE' in ST 'IF' statement.");
 	 yyerrok;
 	}
 | IF error END_IF
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in ST 'IF' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in ST 'IF' statement.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new elseif_statement_c($2, $4, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | ELSIF THEN statement_list
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no test expression defined for 'ELSEIF' statement in ST 'IF' statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no test expression defined for 'ELSEIF' statement in ST 'IF' statement.");
 	}
 | ELSIF error THEN statement_list
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid test expression defined for 'ELSEIF' statement in ST 'IF' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid test expression defined for 'ELSEIF' statement in ST 'IF' statement.");
 	 yyerrok;
 	}
 | ELSIF expression error statement_list
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "expecting 'THEN' after test expression in 'ELSEIF' statement of ST 'IF' statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting 'THEN' after test expression in 'ELSEIF' statement of ST 'IF' statement.");
 	 yyerrok;
 	}
 | ELSIF expression THEN error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid statement list in 'ELSEIF' statement of ST 'IF' statement.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid statement list in 'ELSEIF' statement of ST 'IF' statement.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new case_statement_c($2, $4, $6, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | CASE OF case_element_list END_CASE
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no test expression defined in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no test expression defined in ST 'CASE' statement.");
 	}
 | CASE OF case_element_list ELSE statement_list END_CASE
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no test expression defined in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no test expression defined in ST 'CASE' statement.");
 	}
 | CASE error OF case_element_list END_CASE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid test expression defined for ST 'CASE' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid test expression defined for ST 'CASE' statement.");
 	 yyerrok;
 	}
 | CASE error OF case_element_list ELSE statement_list END_CASE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid test expression defined for ST 'CASE' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid test expression defined for ST 'CASE' statement.");
 	 yyerrok;
 	}
 | CASE expression error case_element_list END_CASE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "expecting 'OF' after test expression in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting 'OF' after test expression in ST 'CASE' statement.");
 	 yyerrok;
 	}
 | CASE expression error case_element_list ELSE statement_list END_CASE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "expecting 'OF' after test expression in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting 'OF' after test expression in ST 'CASE' statement.");
 	 yyerrok;
 	}
 | CASE expression OF END_CASE
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no case element(s) defined after 'OF' in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no case element(s) defined after 'OF' in ST 'CASE' statement.");
 	}
 | CASE expression OF ELSE statement_list END_CASE
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no case element(s) defined after 'OF' in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no case element(s) defined after 'OF' in ST 'CASE' statement.");
 	}
 | CASE expression OF error END_CASE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "invalid case element(s) defined after 'OF' in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid case element(s) defined after 'OF' in ST 'CASE' statement.");
 	 yyerrok;
 	}
 | CASE expression OF error ELSE statement_list END_CASE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "invalid case element(s) defined after 'OF' in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid case element(s) defined after 'OF' in ST 'CASE' statement.");
 	 yyerrok;
 	}
 | CASE expression OF case_element_list ELSE END_CASE
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@5), locl(@6), "no statement defined after 'ELSE' in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locl(@5), locf(@6), "no statement defined after 'ELSE' in ST 'CASE' statement.");
 	}
 | CASE expression OF case_element_list ELSE error END_CASE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@5), locl(@7), "invalid statement defined after 'ELSE' in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locf(@6), locl(@6), "invalid statement defined after 'ELSE' in ST 'CASE' statement.");
 	 yyerrok;
 	}
 | CASE error END_CASE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in ST 'CASE' statement.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new case_element_c($1, $3, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | case_list statement_list
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "':' missing after case list in ST 'CASE' statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "':' missing after case list in ST 'CASE' statement.");
 	}
 | case_list ':' error
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "invalid statement in case element of ST 'CASE' statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid statement in case element of ST 'CASE' statement.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new case_list_c(locloc(@$)); $$->add_element($1);}
 | case_list ',' case_list_element
 	{$$ = $1; $$->add_element($3);}
 /* ERROR_CHECK_BEGIN */
 | case_list ',' error
-{$$ = NULL;
+{$$ = $1;
-	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid case in case list of ST parameter assignment list.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "invalid case in case list of ST parameter assignment list.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new for_statement_c($2, $4, $6, NULL, $8, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | FOR ASSIGN expression TO expression BY expression DO statement_list END_FOR
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no control variable defined in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no control variable defined in ST 'FOR' statement.");
 	}
 | FOR ASSIGN expression TO expression DO statement_list END_FOR
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no control variable defined in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no control variable defined in ST 'FOR' statement.");
 	}
 | FOR error ASSIGN expression TO expression BY expression DO statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid control variable defined for ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid control variable defined for ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR error ASSIGN expression TO expression DO statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid control variable defined for ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid control variable defined for ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable expression TO expression BY expression DO statement_list END_FOR
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "':=' missing between control variable and start expression in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "':=' missing between control variable and start expression in ST 'FOR' statement.");
 	}
 | FOR control_variable expression TO expression DO statement_list END_FOR
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@2), locl(@3), "':=' missing between control variable and start expression in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locl(@2), locf(@3), "':=' missing between control variable and start expression in ST 'FOR' statement.");
 	}
 | FOR control_variable error expression TO expression BY expression DO statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "expecting ':=' between control variable and start expression in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting ':=' between control variable and start expression in ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable error expression TO expression DO statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "expecting ':=' between control variable and start expression in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting ':=' between control variable and start expression in ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable ASSIGN TO expression BY expression DO statement_list END_FOR
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no start expression defined in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no start expression defined in ST 'FOR' statement.");
 	}
 | FOR control_variable ASSIGN TO expression DO statement_list END_FOR
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no start expression defined in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no start expression defined in ST 'FOR' statement.");
 	}
 | FOR control_variable ASSIGN error TO expression BY expression DO statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "invalid start expression defined in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid start expression defined in ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable ASSIGN error TO expression DO statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "invalid start expression in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid start expression in ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable ASSIGN expression error expression BY expression DO statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@6), "expecting 'TO' between start expression and end expression in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "expecting 'TO' between start expression and end expression in ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable ASSIGN expression error expression DO statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@4), locl(@6), "expecting 'TO' between start expression and end expression in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@5), locl(@5), "expecting 'TO' between start expression and end expression in ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable ASSIGN expression TO expression error expression DO statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@6), locl(@8), "expecting 'BY' between end expression and step expression in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@7), locl(@7), "expecting 'BY' between end expression and step expression in ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable ASSIGN expression TO expression BY expression error statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@8), locl(@10), "expecting 'DO' after step expression in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@9), locl(@9), "expecting 'DO' after step expression in ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable ASSIGN expression TO expression error statement_list END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@6), locl(@8), "expecting 'DO' after end expression in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@7), locl(@7), "expecting 'DO' after end expression in ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable ASSIGN expression TO expression BY expression DO END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@9), locl(@10), "no statement(s) defined after 'DO' in ST 'FOR' statement.");
+	 yynerrs++;
-	 yyerrok;
+	 print_err_msg(current_filename, locl(@9), locf(@10), "no statement(s) defined after 'DO' in ST 'FOR' statement.");
 	}
 | FOR control_variable ASSIGN expression TO expression DO END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@7), locl(@8), "no statement(s) defined after 'DO' in ST 'FOR' statement.");
+	 yynerrs++;
-	 yyerrok;
+	 print_err_msg(current_filename, locl(@7), locf(@8), "no statement(s) defined after 'DO' in ST 'FOR' statement.");
 	}
 | FOR control_variable ASSIGN expression TO expression BY expression DO error END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@9), locl(@11), "invalid statement(s) defined after 'DO' in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@10), locl(@10), "invalid statement(s) defined after 'DO' in ST 'FOR' statement.");
 	 yyerrok;
 	}
 | FOR control_variable ASSIGN expression TO expression DO error END_FOR
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@7), locl(@9), "invalid statement(s) defined after 'DO' in ST 'FOR' statement.");
+	 print_err_msg(current_filename, locf(@8), locl(@8), "invalid statement(s) defined after 'DO' in ST 'FOR' statement.");
+	 yyerrok;
+	}
+| FOR error END_FOR
+{$$ = NULL;
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in ST 'FOR' statement.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new while_statement_c($2, $4, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | WHILE DO statement_list END_WHILE
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no test expression defined in ST 'WHILE' statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no test expression defined in ST 'WHILE' statement.");
 	}
 | WHILE error DO statement_list END_WHILE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid test expression defined for ST 'WHILE' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid test expression defined for ST 'WHILE' statement.");
 	 yyerrok;
 	}
 | WHILE expression error statement_list END_WHILE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@2), locl(@4), "expecting 'DO' after test expression in ST 'WHILE' statement.");
+	 print_err_msg(current_filename, locf(@3), locl(@3), "expecting 'DO' after test expression in ST 'WHILE' statement.");
 	 yyerrok;
 	}
 | WHILE expression DO END_WHILE
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no statement(s) defined after 'DO' in ST 'WHILE' statement.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no statement(s) defined after 'DO' in ST 'WHILE' statement.");
 	}
 | WHILE expression DO error END_WHILE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "invalid statement(s) defined after 'DO' in ST 'WHILE' statement.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid statement(s) defined after 'DO' in ST 'WHILE' statement.");
 	 yyerrok;
 	}
 | WHILE error END_WHILE
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in ST 'WHILE' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in ST 'WHILE' statement.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 	{$$ = new repeat_statement_c($2, $4, locloc(@$));}
 /* ERROR_CHECK_BEGIN */
 | REPEAT UNTIL expression END_REPEAT
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@1), locl(@2), "no statement(s) defined after 'REPEAT' in ST 'REPEAT' statement.");
+	 print_err_msg(current_filename, locl(@1), locf(@2), "no statement(s) defined after 'REPEAT' in ST 'REPEAT' statement.");
 	}
 | REPEAT error UNTIL expression END_REPEAT
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "invalid statement(s) defined after 'REPEAT' for ST 'REPEAT' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "invalid statement(s) defined after 'REPEAT' for ST 'REPEAT' statement.");
 	 yyerrok;
 	}
 | REPEAT statement_list UNTIL END_REPEAT
 {$$ = NULL;
 	 yynerrs++;
-	 print_err_msg(current_filename, locf(@3), locl(@4), "no test expression defined after 'UNTIL' in ST 'REPEAT' statement.");
+	 print_err_msg(current_filename, locl(@3), locf(@4), "no test expression defined after 'UNTIL' in ST 'REPEAT' statement.");
 	}
 | REPEAT statement_list UNTIL error END_REPEAT
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@3), locl(@5), "invalid test expression defined after 'UNTIL' in ST 'REPEAT' statement.");
+	 print_err_msg(current_filename, locf(@4), locl(@4), "invalid test expression defined after 'UNTIL' in ST 'REPEAT' statement.");
 	 yyerrok;
 	}
 | REPEAT error END_REPEAT
 {$$ = NULL;
-	 print_err_msg(current_filename, locf(@1), locl(@3), "unknown error in ST 'REPEAT' statement.");
+	 print_err_msg(current_filename, locf(@2), locl(@2), "unknown error in ST 'REPEAT' statement.");
 	 yyerrok;
 	}
 /* ERROR_CHECK_END */
 ;
 if (yynerrs > 0) {
 fprintf (stderr, "\nFound %d error(s). Bailing out!\n", yynerrs /* global variable */);
 exit(EXIT_FAILURE);
 }
 if (tree_root_ref != NULL)
 *tree_root_ref = tree_root;
 fclose(in_file);
 return 0;

changeset 134	0e43c556cd2d
parent 133	fff75b8283be
child 136	32bd7ef40897