Diagnosis
You want to backflush scrap up to a reporting point for a material forwhich you have defined that the reporting point backflush is optional.
The function, 'backflush scrap up to reporting point' is not possibleif quantities have already been backflushed at reporting points. Thismeans, if you have already backflushed yields, you can no longerbackflush scrap to the reporting point.

Procedure
Please use the function, 'backflush scrap at reporting point'.