Diagnosis
A new number range has been determined via user exit'userexit_number_range' from RV60AFZZ. This number range has beenassigned a billing date which deviates from the billing date of thedocument.

System Response
You may only use user exit 'userexit_number_range' if the number rangedetermined via this user exit does not change the billing date. If thenumber range determines the billing date, you must use user exit'userexit_number_range_inv_date' from RV60AFZC.

Note
You can enter the billing date for documents of a number range in theapplication menu. To do this, use the following menu path:
Logistics -> Sales/distribution -> Billing -> Environment -> Setbilling date