diff -r 2e8bf28a8909 -r 07f48018b6f5 py_ext/PythonFileCTNMixin.py
--- a/py_ext/PythonFileCTNMixin.py	Thu Oct 04 12:09:23 2018 +0300
+++ b/py_ext/PythonFileCTNMixin.py	Thu Oct 04 17:24:40 2018 +0300
@@ -27,8 +27,9 @@
 from __future__ import absolute_import
 import os
 import re
+from builtins import str as text
+
 import util.paths as paths
-
 from xmlclass import GenerateParserFromXSD
 
 from CodeFileTreeNode import CodeFile
@@ -74,7 +75,7 @@
                     self.CreateCodeFileBuffer(False)
                     self.OnCTNSave()
             except Exception as exc:
-                error = unicode(exc)
+                error = text(exc)
 
             if error is not None:
                 self.GetCTRoot().logger.write_error(