diff -r 361366b891ca -r 3f1dd8312710 svghmi/svghmi_server.py
--- a/svghmi/svghmi_server.py	Wed Sep 11 12:24:30 2019 +0200
+++ b/svghmi/svghmi_server.py	Thu Sep 12 12:54:36 2019 +0200
@@ -31,7 +31,7 @@
         global svghmi_sessions
         svghmi_sessions.remove(self)
 
-    def onMessage():
+    def onMessage(self, msg):
         # TODO :  pass it to the C side recieve_message()
         #    update HMITree
         #        - values
@@ -87,4 +87,4 @@
 # Called by PLCObject at stop
 def _runtime_svghmi0_stop():
     global svghmi_listener
-    svghmi_listener.stopListening
+    svghmi_listener.stopListening()