Sync Step in BPM fails.

Hi Experts,
I am doing a HTTP>XI>RFC scenario. I am using the BPM .. SO my BPM is very simple and the requirement is if any of the transaction goes wrong the others should not be posted to R/3 from HTTP but rather should wait in a recieve step and once the failed one is corrected and resend then the other should be posted...
So my BPM is like this
Recivece step - > switch (container element CON ! = X ) then sync send to call the BPM - > check whether the return structure has error message E if so setting the container element CON = X thru a container operation and throwing a forced exception to stop the BPM...
I am just testing it, this may not be a complete no of steps but now i get error in my SYNC step itself stating .
Work item 000000000047: Object CL_SWF_XI_MSG_BROKER method SEND_SYNCHRON cannot be executed
Message no. WL821
Diagnosis
The calling of the object method for the work item ended with a return value for which no handling is modeled in the workflow.
I am not handling any exception in the workflow and i am sure that the payload i posted would not return any exception...
I have just given the Sync interface, Request message, response message and the Receiver from Send context for my Sync step
Could you please guide me where i am going wrong..
Thanks in advance for you replies.
Regards,
Rajesh

Hi Rajesh,
The below thread talks about the same issue as you are having and it also talks about couple of OSS notes in it...Please see if they are relevant to your case..
Object CL_SWF_XI_MSG_BROKER method SEND_SYNCHRON cannot be executed
May be you already checked this by searching this on SDN...if yes, please ignore my reply...
Thanks,
Renjith

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>
Christian Abad Chico wrote:
> Hi experts.
> I have a BPM and some of its steps are:
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Sync Step in BPM fails.

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