Have any changes been made since the last successful run?

Changes that have been made to your IBM MQ configuration, maintenance updates, or changes to other programs that interact with IBM MQ could be the cause of your problem.

When you are considering changes that might recently have been made, think about the IBM MQ system, and also about the other programs it interfaces with, the hardware, and any new applications. Consider also the possibility that a new application that you are not aware of might have been run on the system.

  • Have you changed, added, or deleted any queue definitions?
  • Have you changed or added any channel definitions? Changes might have been made to either IBM MQ channel definitions or any underlying communications definitions required by our application.
  • Do our applications deal with return codes that they might get as a result of any changes you have made?
  • Have you changed any component of the operating system that could affect the operation of IBM MQ? For example, have you modified the Windows Registry.


Have you applied any maintenance updates?

If we have applied a maintenance update to IBM MQ, check that the update action completed successfully and that no error message was produced.

  • Did the update have any special instructions?
  • Was any test run to verify that the update was applied correctly and completely?
  • Does the problem still exist if IBM MQ is restored to the previous maintenance level?
  • If the installation was successful, check with the IBM Support Center for any maintenance package errors.
  • If a maintenance package has been applied to any other program, consider the effect it might have on the way IBM MQ interfaces with it.