Check for error messages

Issue the DISPLAY THREAD(*) command to check if the queue manager is running (see the WebSphere MQ Script (MQSC) Command Reference manual for information about the command). If the queue manager has stopped running, look for any message that might explain the situation. Messages appear on the z/OS console, or on your terminal if you are using the operations and control panels. Use the DISPLAY DQM command to see if the channel initiator is working, and the listeners are active. The z/OS command

DISPLAY R,L

lists messages with outstanding replies. Check to see whether any of these are relevant. In some circumstances, for example, when it has used all its active logs, WebSphere MQ for z/OS waits for operator intervention.