IMS
Although Message AdvisorMessage Advisor does not specifically prohibit requeueing messages from one IMS system to another or from one IMS version to another, you should be aware of the following constraints:
- If you requeue from one IMS system to another, the systems must be identical; otherwise, unpredictable and possibly undesirable results may occur. For example, if one IMS system has a transaction defined that does not exist on the other IMS system, Message Advisor discards and does not requeue the messages for the undefined transaction.
- IMS prefixes usually vary from one level of IMS to another. Sometimes fields are in different locations and new functions usually require the addition of new fields. For more information, see Requeuing-between-IMS-versions.
Message Advisor uses the IMS counter to tally the messages dequeued from a destination. Because the IMS counter 'wraps' at 64K, message number 65,536 becomes zero again. Even if more than 65,535 messages are queued to a destination, they will be dequeued; however, DEQUEUE will never report the deletion of more than 65,535. Because Message Advisor uses this same counter to calculate the totals on the DISPLAY Statistics Information panel, the total count will be inaccurate if a destination has more than 65,535 messages.
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