I tried this example: http://twistedmatrix.com/projects/core/documentation/howto/pb-cred.html#auto... (scripts chatserver.py and chatclient.py) but they do not work with python 2.6.4 (twisted 8.2.0). Before the client can do much, the server function User.detached is called resulting in an exception later when User.send is called but self.remote is None. I can fix this by changing chatclient.py: def connected(self, perspective): self.perspective = perspective ... and continue as in the original script it seems that otherwise the perspective is destroyed too early. also the documentation should perhaps mention that the client can only connect to the server once because the server code does not remove a user from her group when she detaches. Is there any more complete example anywhere with better error handling? -- Wolfgang