Diagnosis
In line with the settings in call control, a new planning deliveryschedule should be generated automatically when a new forecast deliveryschedule is created when saving the scheduling agreement.
When the planning delivery schedule was created, the system found thatchanges had been made to the existing planning delivery schedule.
This error can only occur if system settings or field data has beenchanged since the last time the delivery schedule was changed (forexample as a result of an upgrade). In this case, the values of thecurrent planning delivery schedule may have been changed without younoticing.

System Response
The planning delivery schedule is not changed.
If you process the scheduling agreement manually online, the systemissues an information message.
During background processing at IDoc inbound, the system issues anerror message, so IDoc processing is terminated and the planningdelivery schedule is not lost.
During foreground processing at IDoc inbound, the system issues aninformation message: The IDoc can be processed. The planning deliveryschedule is not, however, generated.

Procedure
If this error occurred during manual processing of a schedulingagreement, you still have to save the scheduling agreement. Thenprocess the scheduling agreement again and generate the planningdelivery schedule manually.
If the error occurred at IDoc inbound and the IDoc ended with status51, you must first process the current planning delivery schedulemanually (or generate it again) and save the delivery schedule. You canthen process the IDoc again.
Alternatively, you can process the IDoc in the foreground. Along withprocessing the IDoc, you must manually regenerate the faulty planningdelivery schedule.