Diagnosis
The work center that you maintained in the relationship does not exist.

Procedure
INCLUDE 'NA_ALLG_MOEGLICH' OBJECT DOKU ID TX

• Check whether you entered the correct key for the work center. If
necessary, change it.

• If you do not change the key for the work center, scheduling carried
out using either
the calendar maintained in the operation, or
the Gregorian calendar.