diff -r 38fde37c3766 -r ac0fe8aabb5e PLCControler.py
--- a/PLCControler.py	Sat Aug 19 00:58:44 2017 +0300
+++ b/PLCControler.py	Sat Aug 19 01:11:27 2017 +0300
@@ -415,7 +415,7 @@
         specific_values_tuple, specific_values_translation = \
             _SpecificValuesTuples.get(args[0][0], _BlockSpecificValues)
 
-        if args[0][0] == "step"       and len(self.SpecificValues) < 3 or \
+        if args[0][0] == "step" and len(self.SpecificValues) < 3 or \
            args[0][0] == "transition" and len(self.SpecificValues) < 4:
             self.SpecificValues.append([None])
         elif args[0][0] == "actionBlock" and len(self.SpecificValues) < 1: