AVZ0395E SERVICES MAILBOX REQUEST reqtype ABEND ccode (rsncode) AT modname+offset additinfo1 additinfo2 additinfo3 additinfo4
Explanation
During an attempt to execute a Services mailbox request, an ABEND failure was detected. The request is rejected with a return code indicating that an abend occurred.
reqtype may be "SYSTEM" or "USER"
User response
The failure is reflected to the requesting task, which then takes whatever action is appropriate to the situation. Check for other messages which might indicate the cause of the error, and contact Software Support for further assistance.