Queue Manager Not Active

Event name: Queue Manager Not Active.
Reason code in MQCFH:
MQRC_Q_MGR_NOT_ACTIVE (2223, X'8AF').
Queue manager unavailable.
Event description: This condition is detected when a queue manager is requested to stop or quiesce.
Event type: Start And Stop.
Platforms: All, except WebSphere MQ for z/OS.
Event queue: SYSTEM.ADMIN.QMGR.EVENT.