diff -r 2e8bf28a8909 -r 07f48018b6f5 ConfigTreeNode.py
--- a/ConfigTreeNode.py	Thu Oct 04 12:09:23 2018 +0300
+++ b/ConfigTreeNode.py	Thu Oct 04 17:24:40 2018 +0300
@@ -36,10 +36,11 @@
 import traceback
 import types
 import shutil
+from builtins import str as text
+
 from lxml import etree
 
 from xmlclass import GenerateParserFromXSDstring
-
 from PLCControler import LOCATION_CONFNODE
 from editors.ConfTreeNodeEditor import ConfTreeNodeEditor
 
@@ -277,7 +278,7 @@
         LDFLAGS = []
         if CTNLDFLAGS is not None:
             # LDFLAGS can be either string
-            if isinstance(CTNLDFLAGS, (str, unicode)):
+            if isinstance(CTNLDFLAGS, (str, text)):
                 LDFLAGS += [CTNLDFLAGS]
             # or list of strings
             elif isinstance(CTNLDFLAGS, list):
@@ -627,7 +628,7 @@
                 self.MandatoryParams = ("BaseParams", self.BaseParams)
                 basexmlfile.close()
             except Exception as exc:
-                msg = _("Couldn't load confnode base parameters {a1} :\n {a2}").format(a1=ConfNodeName, a2=unicode(exc))
+                msg = _("Couldn't load confnode base parameters {a1} :\n {a2}").format(a1=ConfNodeName, a2=text(exc))
                 self.GetCTRoot().logger.write_error(msg)
                 self.GetCTRoot().logger.write_error(traceback.format_exc())
 
@@ -644,7 +645,7 @@
                 self.CTNParams = (name, obj)
                 xmlfile.close()
             except Exception as exc:
-                msg = _("Couldn't load confnode parameters {a1} :\n {a2}").format(a1=ConfNodeName, a2=unicode(exc))
+                msg = _("Couldn't load confnode parameters {a1} :\n {a2}").format(a1=ConfNodeName, a2=text(exc))
                 self.GetCTRoot().logger.write_error(msg)
                 self.GetCTRoot().logger.write_error(traceback.format_exc())
 
@@ -657,6 +658,6 @@
                 try:
                     self.CTNAddChild(pname, ptype)
                 except Exception as exc:
-                    msg = _("Could not add child \"{a1}\", type {a2} :\n{a3}\n").format(a1=pname, a2=ptype, a3=unicode(exc))
+                    msg = _("Could not add child \"{a1}\", type {a2} :\n{a3}\n").format(a1=pname, a2=ptype, a3=text(exc))
                     self.GetCTRoot().logger.write_error(msg)
                     self.GetCTRoot().logger.write_error(traceback.format_exc())