--- a/stage4/generate_c/search_varfb_instance_type.cc	Fri May 15 10:23:20 2009 +0200
+++ b/stage4/generate_c/search_varfb_instance_type.cc	Mon May 18 13:19:30 2009 +0200
@@ -77,7 +77,7 @@
       symbol_c *var_decl = search_var_instance_decl.get_decl(var_name_part);
       if (NULL == var_decl) {
         /* variable instance declaration not found! */
- 	      return NULL;
+ 	      ERROR;
       }
 
       /* if it is a struct or function block, we must search the type