Internal message could not be sent
An internal message could not be sent, which probably means that one of the internal message queues is not functioning correctly.
Restart the ISDN_Call_Transfer custom server.
If the problem persists, take an AIX system trace while re-creating the problem. Specify the -d command line parameter for the custom server. Then call Blueworx Support.
Yellow (errorid = 20503)
Log, System Monitor.