Issue in Multi Mapping

Hi SAP PI Experts

I am trying to create a multi mapping . There are two messages in Source and same two messages in Target mapped one to one as below :

<messages>

       <message 1>(1 to 1)

              <OrderCreate >     ........</OrderCreate >(0 to 1)

       </message 1>

       <message 2>(1 to 1)

                <OrderChange >     ........</OrderChange>(0 to 1)

       </message 2>

</messages>

when order create comes in source i want to create order create in target and same with order change (only one message in source and target).I have used Create IF condition in the mapping for the same .

while running the scenario end to end everything works fine for the first message (order create) but for the second message order change i am getting the error "Split Mapping does not creates message".

when i am creating both the messages then its runs fine.

Kindly let me know if both the messages are mandatory to be generated in target or we can create any one message based on condition.

Thanks in advance

imran ashraf