Description:
Description:
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In TIBCO Business Studio, when configuring an event handler (a catch intermediate event with no incoming flow), do not use the "Allow concurrent flows for this event handler" option (on the General tab of the Properties view).  

Using concurrent flows in an event handler can have unpredictable results such as the following:

* If there is a response message, it may go to the wrong instance, or the send activity may fail.

* If the event data for all concurrent instances is not the same, one instance could use data from another instance.

Environment:
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   o TIBCO Business Studio 3.5.10 (+ Hotfixes).
Symptoms:

Cause:

Using concurrent flows in an event handler can have unpredictable results.