The system attempted to establish a Message Data Block (MDB) listener exit but was unsuccessful.
The operating system continues running in degraded mode. The system will not accept messages sent from the service processor.
Notify the system programmer.
Look in the logrec data set error record for problem-related data. For a hardware problem, contact hardware support. Otherwise, search problem reporting data bases for a fix for the problem. If no fix exists, contact the IBM® support center.
Service Processor Interface