Determines whether CA OPS/MVS attempts to automatically eliminate duplicate IMS messages from the OPSLOG and AOF rules. The value n is a number (in the range of 1 to 32) of an IMS control region.
Many IMS messages are simply passed to the IMS exit (IOF), while many are passed to the IOF and WTOd by IMS. You can differentiate between these two cases in your AOF rules by using the OPSINFO("EXITTYPE") function of OPS/REXX. If the message is simply passed to the IOF, the function returns the string IMS. If the message is also WTOd by IMS, the function returns the string MVS.
The EXITTYPE column in the OPSLOG provides the same information as discussed above. The algorithm for eliminating duplicate messages is very simplistic to avoid adding too much overhead to the process. Due to its simplicity, the algorithm is unlikely to work well in an environment that has heavy IMS message traffic. Therefore, we recommend that you leave this parameter set to the default value (NO) and use the OPSINFO("EXITYPE") function in your AOF MSG rules to avoid processing messages from both the IMS and MVS exits.
NO
This value is for all IMS regions. Use this value when most of the rules automating your IMS messages simply suppress duplicate IMS WTOs. However, when automation rules do more than just suppression and the IMSnDROPDUPLICATE parameter is set to NO, the rules must take responsibility for avoiding duplicate processing.
YES
When the parameter value is YES, CA OPS/MVS does not automate the duplicate IMS message.
Anytime
Example: IMSnDROPDUPLICATE
This function prevents automation for duplicate IMS WTOs from IMS region 5:
OPSPRM('SET','IMS5DROPDUPLICATE','YES')
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