--- a/runtime/PLCObject.py	Mon Mar 04 17:49:38 2013 +0900
+++ b/runtime/PLCObject.py	Tue Mar 05 20:12:51 2013 +0900
@@ -67,6 +67,7 @@
         self.hmi_frame = None
         self.website = website
         self._loading_error = None
+        self.python_threads_vars = None
         
         # Get the last transfered PLC if connector must be restart
         try: