Debit note creation
I want to know the confg for the below scenarion.
i had created one billing doc for x product and 50 quantity.later i had situation of charging debit note for 30 units,so i went to VA01 and with ref to billing doc i had completed the process.
later i had again charged debit note for remaining 20 units with ref to same billing doc in this situation system is giving us information of there are already returns for 30 units and debit memo already exist for 30 units.
how to congigure for this kind of information message.