BPM handle empty message in send step

Hi, Friends:
I have a following BPM sceario(PI7.1 EHP1)
It mainly has following steps:
Receive -> Transformation (Multi-Mapping) -> Fork (4 branches: one send step each branch)
The multi-mapping result is to generate 4 types of messages based on logic.
Sometimes all 4 types of message generated, and sometimes only one type of message generated.
When there is a message not generated, the send step generate error which is not caught in exception branch.
I searched forum, so far not lucky to find solution.
Any idea how to handle empty message (do not send it) in send step?
Regards
Liang
Edited by: Liang Ji on Dec 7, 2010 8:42 PM

Hi, Abhishek:
The reason to use Fork is that all the branches can be reached.
By using switch, it only judge one input value and only one condition turns true.
Actually in most cases, the number of my input value is more than one, saying two or more message types generated.
And this is not multi-line situaion, because the messages generated are different types.
Your reply remind me to add switch inside fork.
Regards
Liang
Edited by: Liang Ji on Dec 8, 2010 5:32 PM

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Hi, Abhishek:
The reason to use Fork is that all the branches can be reached.
By using switch, it only judge one input value and only one condition turns true.
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Your reply remind me to add switch inside fork.
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Liang
Edited by: Liang Ji on Dec 8, 2010 5:32 PM

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BPM handle empty message in send step

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