I have a client with a new 400. They currently connect to their old 400 via a Java App. Sorry, no idea what the app is, but when they try to connect to the new box, they get this error: _X11TransSocketINETConnect() can't get address for /tmp/launch-0smpqh/:6000.
He thinks it's something not started on the 400. I've started the Host Servers and IP servers.