BPM process calling another BPM process synchronously

Question

Hi,
When have a BPM (SCENARIO_1) that receives a request.
The BPM makes a SYNC call to another BPM (SCENARIO_2_SYNC_SEND). The second BPM should return the sync response to the first BPM. The second BPM has been implemented as a SYNC/ASYNC bridge. .........This scenario is NOT working.
We have independently tested the second BPM and can confirm that it works correctly and as expected when it is NOT called by another BPM.
design steps of BPM
1. BPM (SCENARIO_1)
           start -> receive(async) - >send(sync - calls 2nd BPM) -> stop
2. BPM (SCENARIO_2_SYNC_SEND). (this BPM is invoked by first BPM (SCENARIO_1)
            start ->receive(sync -open SA bridge) ->send(sync - calls webService) ->send(closes SA bridge)
Is SAP PI supports synchronous call from one BPM to another BPM???
rgds,
RDS

Answer 1

Hi Henrique,
we also done the BPM calling another BPM asynchronousl;y, which is working fine.
In this case, I designed BPM like follows (as initially mentioned)
1. BPM (SCENARIO_1)
start -> receive(async) - >send(sync - calls 2nd BPM) -> stop
Note : In 'send' step, I selected 'Create New Transaction'.......if I don't select this property then system dumping without invoking the second BPM, When I select this property the second BPM is invoked after the 1st BPM completes i.e it waits for  CHECK_FOR_ASYNC_RESPONSE_TIMEOUT (default value 60 secs)  to elapse. during this time an entry in the outbound queue (smq2) appears 
2. BPM (SCENARIO_2_SYNC_SEND). (this BPM is invoked by first BPM (SCENARIO_1)
start ->receive(sync -open SA bridge) ->send(sync - calls webService) ->send(closes SA bridge)
how do we check whether it using more than one queue??
we have only looked at smq1 & smq2.
We see an entry in SMQ2 which stays there for the timeout period of the first BPM.
It seems as if the second bpm doesnt see it until the first BPM closes.  
I might think this is appropriate behaviour to stop the engine processing the same message more than once which would explain the behaviour we are seeing. However this would mean PI would not support BPM synchronously calling BPM which is what we are trying to determine if it is supported. 
We cant find any documentation saying this is possible and alot of documentation indicates workarounds.
Have you ever seen this scenario implemented.
<removed by moderator>
Hi supriya,
There is no problem in getting the response from webservice, the problem is the BPM which calls webservice itself invoked after the timeout of first BPM.
Edited by: Shankar Raju Devadoss on Aug 25, 2010 7:21 AM
Edited by: Shankar Raju Devadoss on Aug 25, 2010 7:32 AM
Edited by: Prateek Raj Srivastava on Aug 25, 2010 11:24 AM