You said you replaced "PROPAGATE" with "RETURN TRUE" then this solved the problem. This suggests to me that you did not have a RETURN TRUE statement at all at the end of your method. If that was the case then the compute node would have an implicit RETURN TRUE when all the ESQL has been executed. If so, when returning from PROPAGATE the OutputLocalEnviroment would by default be deleted and then an implicit RETURN true would have do a final propagate with no destinations. This might cause the error you were seeing. Once you replaced PROPAGATE with RETURN TRUE; then the Compute node would have no default propagation at the end. If you are using PROPAGATE; then it is likely you will need RETURN FALSE; at the end of the ESQL so that you don't propagate anything else.
It is worth noting that in IIB V10 we now have activity log for WMQ calls. So if you view a flows activity log through the WebUI you will see when MQ calls are taking place such as MQPUT, MQCMIT etc. Might help give you pointers in future when you have issues of this kind. _________________ Regards
Craig
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