Issues in Old Invoice reversal after Activating FM
We are implementing the FM in already running production environment. There is a scenario that if we activate the FM say on 1st December and after that we are reversing an invoice of already exisitng PO which was completed before 1st Dec. When we reverse the invoice system needs fund centre as there is no derivation strategy defined for that particular scenario.The issues faced are as below:
1) There is no FM accounting assignments in PO and when we try to assign say fund centre with the help of transaction FMCN and FMCT then system gives errror that it is not possible because GR already done.
2) Now in case we assign fund centre to PO by any way then it is not logical as it may create extra funds in the Fund Centre.
Please advise if there is any way to assign fund centre to the PO's for which GR is completed.
Thanks & Regards