Hi<br />
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I have a Question on XML messaging with MQ Queues for activities configured to USER PROGRAM EXECUTION AGENT.<br />
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It is possible to start and finish an activity through XML message by defining the UPES as MQ-Queue for an activity, it means when an activity starts WF Engine sends a message to MQ-Queue and external applications can read the message and can send a response to the activity to finish it(in case of synchronous).<br />
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But how to handle the Activities which are configured for USER PROGRAM EXECUTION AGENT with messaging, <br />
Is it possible to checkout and checkin these activities by sending an XML message to external applications?<br />
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I mean, when a workitem is checkedout, WF engine has to send a checkout XML message to external application, when an external sends a checkin XML message to WF engine workitem should get finish. <br />
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Is it possible to have such a message based communication for USER PROGRAM EXECUTION AGENT acitvities?

I am confused, you seem to be mixing use of PEA and UPES. Generally, do not use PEA with MQWF anymore, which means no use of Program Execution Agent. If you have a UPES activity, that will be started when MQWF sends the appropriate message to the UPES queue, and completed when the UPES sends the appropriate reply. If you have a Human activity, that will be run via the api (checkout/checkin) using a client like the IBM supplied WebClient.<br />
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<br>Regards <br />
<br>
<br>John McDonald<br />
<br>EmeriCon, LLC