The Output Post-processor is running but has not picked up this request.

OPP Error in the Log file:

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The Output Post-processor is running but has not picked up this request.
No further attempts will be made to post-process this request, and the request will be marked
with Warning status.
Setting the profile option Concurrent: OPP Response Timeout to a higher value may be necessary.
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Solution:

A) Restart the Output Post Processor and re-test the issue.

Navigation:-

Concurrent→Manager→Administer
You can restart using the RESTART Button or You can terminate the manager and Activate it again.
Use the terminate button and active button to achieve this.


B) If the above ddint solve your issue, Increase the below profile options and re-test the issue

Concurrent:OPP Process Timeout to 600 (300*2)

Concurrent:OPP Response Timeout TO 240 (120*2)

C) If A and B didnt work, Increase the procesess of the Outpost Processor (double it i.e if you have 1 increase it to 2) from Concurrent - Manager - Define screen

and restart the OPP, That should resolve this issue.