Created multicast session and connected two clients by booting on the cdrom. The clients start up and connect to the server and wait for the server to start the session. As soon as the allotted time is up, the server starts the session and both clients disconnect with error

zenworks imaging failed with error 254

I cannot find anywhere on the net what this error is. Do you know?

I'm assuming it might be a multicast network issue. The computers have been imaged manually before. They are on the same subnet as the server.