This check determines whether the message flow from and to the specified partners is unambiguous. It also checks whether the partner profiles have been maintained for each message flow.
The message types and BAPIs in the partner profiles are output (or which BAPIs have been specified for synchronous calls, but are not in the distribution model).
You can go to the transactions Maintain Distribution Model (transaction code BD64), Assign RFC Dest. to Log. Systems (BD97), and Partner Profiles (WE20).
You receive a list of all relevant messages.