How to configure Integration Builder using an Integration Process?

Question

Dear experts,
I have problems configuring the Integration builder using a Integration process.
Scenario = idoc to PI, integration process transforms idoc to file, file to external system.
My integration process starts with an abstract interface (structure of idoc) and ends with an abstract interface (structure of file). But I just can not configure the integration builder correctly...
I did it as follows:
Sender agreement: comm.component = SAP system; interface = Idoc;
receiver determination: comm.component = SAP system; interface = Idoc; configured receiver = my integration process;
interface determination: comm.component = SAP system; interface = Idoc; receiver = target system comm.component;
Receiver agreement: comm.component = SAP system; receiver =  target system comm.component; interface = filestructure of target
This does not work unfortunately. How can I pass the Idoc to my abstract interface? And how can I pass the result of my integration process (abstract interface) to the inbound interface? In the interface determination I can not select my Operation Mapping (but that should not be nessesary as I already created an Integration Process)...
Hope anyone can help.
Thanks and regards
William

Answer 1

Just consider your BPM is receiver, and sender:
Src --> BPM  (BPM is Receiver)
==========
Sender Agreement (If it is IDOC or HTTP, then you do not have to create)
Commnunication Channel
Receiver Determination
Interface Determination    
BPM --> Target (BPM is sender)
============
Receiver Determination
Interface Determination    
Communication Channel
Receiver Agreement
If your BPM interact with other systems, you will have more Receiver Determination and Interface determination, possible Receiver agreement
Hope this clear your doubts
Liang