--- a/PLCGenerator.py	Wed Aug 01 14:09:12 2018 +0300
+++ b/PLCGenerator.py	Thu Aug 09 13:58:47 2018 +0300
@@ -926,6 +926,9 @@
         if blk is None:
             return None
 
+        if not hasattr(blk, "inputVariables"):
+            return None
+
         for invar in blk.inputVariables.getvariable():
             if invar.getformalParameter() == "EN":
                 if len(invar.getconnectionPointIn().getconnections()) > 0: