--- a/PLCControler.py	Mon May 21 18:50:16 2012 +0200
+++ b/PLCControler.py	Tue May 22 10:14:24 2012 +0200
@@ -397,7 +397,7 @@
             edit = debug = pou_type is not None
             if pou_type is None:
                 block_infos = self.GetBlockType(var_type, debug = debug)
-                if block_infos is None:
+                if block_infos is not None:
                     pou_type = block_infos["type"]
             if pou_type is not None:
                 var_class = None