Making initial checks

There are some initial checks that you can make that may provide answers to common problems that you might have.

• Carry out the initial checks for your platform:
  • Making initial checks on AIX
  • Making initial checks on IBM i
  • Making initial checks on Linux
  • Making initial checks on Windows
  • Making initial checks on z/OS

Tips for system administrators

• Check the error logs for messages for your operating system:
  • Error logs on AIX, Linux, and Windows
  • Error logs on IBM i
  • Diagnostic information produced on IBM MQ for z/OS
• Check the contents of qm.ini for any configuration changes or errors.
  For more information on changing configuration information, see:

  • Changing configuration information on AIX, Linux, and Windows
  • Changing configuration information on IBM i
  • Customizing your queue managers on z/OS
• If your application development teams are reporting something unexpected, you use trace to investigate the problems.
  For information about using trace, see Tracing.

Tips for application developers

• Check the return codes from the MQI calls in your applications.
  For a list of reason codes, see API completion and reason codes. Use the information provided in the return code to determine the cause of the problem. Follow the steps in the Programmer response sections of the reason code to resolve the problem.
• If you are unsure whether your application is working as expected, for example, you are not unsure of the parameters being passed into the MQI or out of the MQI, you can use trace to collect information about all the inputs and outputs of your MQI calls.
  For more information about using trace, see Tracing. For more information about handling errors in MQI applications, see Handling program errors.