One Sender system and two receivers system(Sync) . Pls help

Question

Hello All,
Help required to make one scenario in XI.
Currently there is one interface (XI is not used) that is already in place.
CRM sender system
DM and ERP Receiver systems.
CRM RFC call DM RFC directly and same CRM RFC call ERP RFC directly.
Result (can be error or correct)is returned back to CRM RFC from DM and ERP RFC's.
Now I want to make this scenario in XI.
If I make without BPM I get message 'Multiple receivers are not allowed for Sync systems in Receiver Determination.
Pls advice how to make this scenario with Error an Exception Handling.
Regard

Answer 1

Rick,
this makes no sense - there must be some differentiation. It woudn't be necessary only if there was one function, which first calls DM and then calls ERP and both calls would be done INSIDE this one function.
I meant, that you have only one function, which calls both systems - I mean - the same interface would call the system... Do you know what I mean?
Whatever..
I have a better solution for you. Do you know what ABAP proxies are? Let's do it this way and it will be the easiest and most reliable way.
Create 2 interfacec - one will call DM and one ERP. Develop 2 separate scenarios. No conditions - Just 2 simple scenarios. On the CRM system go to t-code sproxy. (eeee, hope you have an SAP CRM and have configured settings to be able to develop proxy objects.)
Generate proxies and replace current functions by calling the proxy objects' methods.
This is of course possible only if u have
a, CRM from SAP
b, configured settings XI<->CRM (usually does basis team)
Ok, again one thing: CHECK how your current scenario work - how are the calls made.. I believe, there are 2 different calls in one function, so when the function in CRM is ran, first call is made and then the second. But forget this general function, because it is not the interface. The interfaces are the functions which really try to send and receive data. And they simply CAN'T be the same, otherwise it wouldn't be possible for CRM to know, to which system should be the call made to!!! So, ask you colleagues for THESE TWO calls. If they tell you, no, there is only one call, which is general (which is bullshit, because it simply can't - again, there must be at least some flag or what), then just tell them - ok, this is not possible. I need a flag to be able to differentiate the messages (and this will be the condition in receiver determination) or simply let them to develop for you 2 independent function. ! for call to DM and 1 to call to ERP. You will then create 2 separate scenarios and they will use these 2 functions in their one general or whatever...
ufffff
Peter