hi, I will try.
We have a Purchase Order checked for GR and GR-Based IV. We receive an Invoice and for some reason the "Delivery Complete Indicator" is set manually by someboddy. This result in that the committment in the Project or Service Order disappeare. If we then close the account assignment object the cost will never be allocated to the correct cost center. If we can open the "aa" we can solve the problem, but if we cannot another cost center has to take the cost most likely the "overhead"