--- a/PLCControler.py	Mon Apr 07 10:07:37 2008 +0200
+++ b/PLCControler.py	Thu Apr 10 19:24:36 2008 +0200
@@ -1761,6 +1761,8 @@
         words = tagname.split("::")
         if words[0] in ['P', 'T', 'A']:
             pou = self.Project.getpou(words[1])
+            if not pou.interface:
+                pou.interface = plcopen.pou_interface()
             pou.addpouVar(type, name)
             
     def ChangeEditedElementPouVar(self, tagname, old_type, old_name, new_type, new_name):