How to control flow of messages to target

I am using a Multi mapping in the Message mapping. The structure of Target message is as follows.
Messages1
+Node1
+Node2 ( duplicate sub tree of Node1)
+Node3 ( duplicate sub tree of Node1)
+Node4 ( duplicate sub tree of Node1)
Messages2
+structureNode
Messages3
+NodeStructures
I am using a Enhanced Interface determination so that Node1, Node2....., structureNode ( of messages2), NodeStructures ( of messages 3) will go as a seperate message to target.
Suppose,
None of the Nodes under Messages1 get generated in mapping but still messages1 will be sent to the target as a single message.
THe target system is facing problems with this and generating error messages each time this happens.
I would like to stop processing empty messages on PI.
Whr should I stop such empty messages?can I add a module that provides me this facility?
Why did SAP provide empty messages stop option in File not in SOAP?
I know this provision is there in File CC but not in SOAP.
Things I cannot do:
1. Cannot have a mapping that will restrict messages, because I am using a multi mapping with each messae as 1...1 so I canot use @ MM.
2. I canot use ext receiver determination because I need to choose my target message based on the target mapping result not from the source payload...
Now how do I solve this problem?
Thanks,
Nikhil

its the second case.
good you are saved from some tedious settings
I used multi mapping in which case, multiple messages exists and each messages has 1...1 so it will always appear with no value in any of its fields.
Where do you want me to place the condition for mandatory fields?
see the mandatory fields always apear in source but I wanna filter on the target mapping.
The condition has to be put in the mapping program that you are using...check out my answer in the following thread...
Re: Generate the Element on target if the value exists in Source element
functionality remains the same...just implementation depends on what mapping program you use(graphical, xslt.....)
Regards,
Abhishek

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If 10 out of 10 experts in any field say something is bad, you should probably take their opinion seriously.

How to control flow of messages to target

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