Does the problem affect specific parts of the network?

You might be able to identify specific parts of the network that are affected by the problem (remote queues, for example). If the link to a remote message queue manager is not working, the messages cannot flow to a remote queue.

Check the following:

• Is the connection between the two systems available, and has the intercommunication component of WebSphere MQ for iSeries started?

  Check that messages are reaching the transmission queue, the local queue definition of the transmission queue, and any remote queues.

• Have you made any network-related changes that might account for the problem or changed any WebSphere MQ for iSeries definitions?

• Can you distinguish between a channel definition problem and a channel message problem?

  For example, redefine the channel to use an empty transmission queue. If the channel starts correctly, the definition is correctly configured.