SAP Message RSAR503 - An RFC call-up triggered the exception

Diagnosis
The call-up of a function to another system (RFC call-up) has reportedan error situation.
A detailed error description is not available.

Procedure
After confirming this message a list of all of the application logsthat come into question will be displayed. Detailed information as tothe cause of the error can be found in this log.

120692Error when calling a function in the source system