Dealing with incorrect output on z/OS

Incorrect output can be missing, unexpected, or corrupted information.

The term "incorrect output᾿ can be interpreted in many different ways. Points to consider if you have obtained what you believe to be some incorrect output are:

When to classify output as incorrect
"Incorrect output᾿ might be regarded as any output that you were not expecting. However, use this term with care in the context of problem determination because it might be a secondary effect of some other type of error. For example, looping could be occurring if you get any repetitive output, even though that output is what you expected.
Error messages
IBM® MQ also responds to many errors it detects by sending error messages. You might regard these messages as "incorrect output᾿, but they are only symptoms of another type of problem. If you have received an error message from IBM MQ that you were not expecting, see Are there any error messages, return codes or other error conditions? in Identifying characteristics of the problem on z/OS.
Unexpected messages
Your application might not have received a message that it was expecting, or has received a message containing unexpected or corrupted information, or has received a message that it was not expecting (for example, one that was destined for a different application).

The subtopics contain information about the problems that you could encounter with your system and classify as incorrect output:

Application messages that do not arrive when you are expecting them
Application messages that contain the wrong information, or information that has been corrupted

Additional problems that you might encounter if your application uses distributed queues are also described.