diff -r 933fbe9a5e2c -r 866fb3ab8778 PLCControler.py
--- a/PLCControler.py	Fri Oct 13 13:17:42 2017 +0300
+++ b/PLCControler.py	Mon Oct 16 17:20:31 2017 +0300
@@ -240,7 +240,7 @@
             setattr(self, attr, value if value is not None else "")
 
     def copy(self):
-        return _VariableTreeItem(*[getattr(self, attr) for attr in self.__slots__])
+        return _VariablesTreeItemInfos(*[getattr(self, attr) for attr in self.__slots__])
 
 
 class VariablesTreeInfosFactory(object):
@@ -1592,7 +1592,7 @@
                  "list": [
                     datatype.getname()
                     for datatype in confnodetypes["types"].getdataTypes()
-                    if not only_locatables or self.IsLocatableDataType(datatype, debug)]}
+                    if not only_locatables or self.IsLocatableDataType(datatype)]}
                 for confnodetypes in self.ConfNodeTypes]
 
     def GetVariableLocationTree(self):