If a system service represented by a service request block (SRB) experiences a problem, the system gives control to the recovery routine for the service; the routine can issue a SETRP macro to place a system completion code in the system diagnostic work area (SDWA). The system service stops processing. If the service was processing a request from a task, the system abnormally ends the task with the same system completion code.

Note that another task can request the system service to do processing.