Multi-Mapping, only want to create target messages sometimes.

Hi,
I have a Multi-Mapping interface which maps a single incoming message to 3 target messages.
Based on the contents of the incoming message I only want to create a single instance of the outgoing messages.
The incoming message can have a repeating node of 3 types A, B or C. If there are multiple nodes of Type A then i need to create a single instance of one of the target messages and map the data in node A to this message, likewise for node B and node C.
I cant figure out how to do this. If I map a constant to the MT level of the target message and there are no type C nodes then the message type for this is created blank. But if I try and use the CreateIf tool then I get a MT created for each type C node.
Can anyone help with this?
If this isn't clear I will try to explain more.
Thanks

Hi,
Thanks for your answer, I tried what you suggested and while it is creating the MT for type A nodes correctly it is not creating the MT for type B or C nodes. I have tried messing with the context on the incoming field and not getting anywhere.
I always seem to get almost there with this mapping but never what I am looking for.
Gareth

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Message was edited by:
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