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Starting user trace
Use user trace for debugging your applications; you can trace brokers, execution groups, and deployed message flows. Start user trace facilities using the mqsichangetrace command or the WebSphere® Message Broker Explorer.
Before you start:
Before you start to trace a broker, or one of its execution groups or message flows, the broker must be running, and you must have deployed the message flows by using the WebSphere Message Broker Explorer. Follow the instructions in the Packaging and deploying topic.
Example: starting user trace for the default execution group
mqsichangetrace MB8BROKER -u -e default -l normal
where:-u specifies user trace
-e specifies the execution group (in this case, the default execution group)
-l specifies the level of trace (in this case, normal)

F MQP1BRK,ct u=yes, e='default', l=normal
Example: starting user trace on all the message flows in the default execution group from the WebSphere Message Broker Explorer
To start normal level user tracing on all the message flows in the default execution group from the WebSphere Message Broker Explorer:
- In the Navigator view, expand the Brokers folder and right-click the execution group with which you want to work.
- Click
Example: starting user trace for a message flow from the WebSphere Message Broker Explorer
To start normal level user tracing for one of your message flows from the WebSphere Message Broker Explorer:
- In the Navigator view, expand the Brokers folder and right-click the message flow with which you want to work.
- Click
An alert saying Message Flow is tracing at level 'normal' is displayed in the Alert Viewer.