--- a/ProjectController.py	Thu Sep 28 17:24:33 2017 +0300
+++ b/ProjectController.py	Fri Sep 29 15:36:33 2017 +0300
@@ -228,6 +228,7 @@
 
     def __init__(self, frame, logger):
         PLCControler.__init__(self)
+        ConfigTreeNode.__init__(self)
 
         if ProjectController.iec2c_cfg is None:
             ProjectController.iec2c_cfg = Iec2CSettings()