Problem: It is possible to register a multiplex server multiple times, or register multiple servers of the same multiplex set in Sybase Control Center, but only the first authenticated resource allows you to successfully authenticate the login account for the resource. Any attempts to authenticate an additional multiplex server resource of the same multiplex set generates an error and is not successful.
Solution: In the Resource Explorer, remove all but one instance of the registered multiplex resources.
Alternatively, take note of the resource name identified in the error message, and in the Resource Explorer add that resource to the Perspective view.