I have found this posting
Splitting a message into multiple Idocs
and now I am a little bit afraid that our planned process using BPM is not working:
a) XI receives an IDOC
b) XI continues with calling an external system sync.
c) Sync message response and IDOC are used to be merged into one new message M using transformation step (2 messages into 1 new)
d) send message M to receiver
Now I have read (see link) that IDOCs cannot be used in such multimapping steps. Is this true?
Can anybody give some information?