WBS element determination in SD billing
We are using WBS element for positing accounting document in billing.
In our case flow starts from Service order->QT -> debit memo req-> Debit memo.
WBS element is mandatory field in Service order(IW31) and with reference to Service order DMR is created.
While creating the Debit memo in VF01 different WBS element is getting determined which is not activated for account postiing in CJ03.
Kindly help me out why the different WBS element is coming in billing doc and how this determation will happen in billing.