SAP Message 26091 - Enter program exit for document number (NumExit)

Diagnosis
In the standard system, program MCDOKZNR controls number assignment fordocuments. In the standard version, a consecutive number is assigned toa document, whatever its document type. This number is purely numeric.
Mixed number assignment (combination of an internal and externalportion) is carried out per document type by the routine GET_NUMBER.
You can also write your own number assignment program.

Procedure
Enter the program which controls number assignment.