diff -r d5df428640ff -r ccf59c1f0b45 connectors/WAMP/__init__.py
--- a/connectors/WAMP/__init__.py	Thu Aug 17 15:43:25 2017 +0300
+++ b/connectors/WAMP/__init__.py	Thu Aug 17 16:26:32 2017 +0300
@@ -137,7 +137,7 @@
                     reactor, RegisterWampClient)
             if not _WampSessionEvent.wait(5):
                 _WampConnection = stopConnecting()
-                raise Exception, _("WAMP connection timeout")
+                raise Exception(_("WAMP connection timeout"))
 
         def __del__(self):
             global _WampConnection