Diagnosis
You are trying to change the cash discount terms or payment block in anFI document that belongs to a down payment chain. In this case, you canonly make changes in the customer line item or vendor line item. Inparticular, it is not allowed to change values in a retention amountline with a special G/L indicator.

Procedure
Stop making changes to the document and make sure that you are onlychanging the vendor line item. If you are certain of this but the errorstill occurs, then there is an error in the database. In this case,contact your system administrator.