--- a/PLCControler.py	Fri Feb 16 18:38:30 2018 +0100
+++ b/PLCControler.py	Sat Feb 17 16:42:56 2018 +0100
@@ -38,7 +38,7 @@
 import util.paths as paths
 from util.TranslationCatalogs import NoTranslate
 from plcopen import *
-from plcopen.XSLTModelQuery import XSLTModelQuery
+from plcopen.InstancesPathCollector import InstancesPathCollector
 from graphics.GraphicCommons import *
 from PLCGenerator import *
 
@@ -268,24 +268,6 @@
                     [_BoolValue] * 2, args) + [[]])))
 
 
-class InstancesPathCollector(XSLTModelQuery):
-    """ object for collecting instances path list"""
-    def __init__(self, controller):
-        self.Instances = []
-        XSLTModelQuery.__init__(self,
-                                controller,
-                                "instances_path.xslt",
-                                [("AddInstance", self.AddInstance)])
-
-    def AddInstance(self, context, *args):
-        self.Instances.append(args[0][0])
-
-    def Collect(self, root, name, debug):
-        self._process_xslt(root, debug, instance_type = name)
-        res = self.Instances
-        self.Instances = []
-        return res
-
 class InstanceTagName(object):
     """Helpers object for generating instance tagname"""
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plcopen/InstancesPathCollector.py	Sat Feb 17 16:42:56 2018 +0100
@@ -0,0 +1,26 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# This file is part of Beremiz.
+# See COPYING file for copyrights details.
+
+from __future__ import absolute_import
+from plcopen.XSLTModelQuery import XSLTModelQuery
+
+class InstancesPathCollector(XSLTModelQuery):
+    """ object for collecting instances path list"""
+    def __init__(self, controller):
+        self.Instances = []
+        XSLTModelQuery.__init__(self,
+                                controller,
+                                "instances_path.xslt",
+                                [("AddInstance", self.AddInstance)])
+
+    def AddInstance(self, context, *args):
+        self.Instances.append(args[0][0])
+
+    def Collect(self, root, name, debug):
+        self._process_xslt(root, debug, instance_type = name)
+        res = self.Instances
+        self.Instances = []
+        return res
+