Change account assignment category for services with ME22N

Question

Dear guru ,
i have created a purchase order for a position with item category D(service) and account assignment category K(cost centre). I have inserted for the accounting view the cost center.
After the saving If I a try to change the purchase order position with ME22N the system donu2019t allow to change the account assignment category (F order instead of K).
I have verified that for other positions with account assignment category K(cost centre) but for Item category blank(standard) the system allow to change the account assignment category if not exist goods receipt or invoice.
Whatu2019s the problem about services ?
Thanks

Answer 1

Hi,
Usually the Account assigned PO's are fixed with Account assignment, you cann't modify the account assignment once it is saved.
It depends on the IMG settings for Account assignment category.
Check the following IMG Settings
SPROMMPurchasingAccount assignment-Maintain account assignment categories
Here check for "K" --Costcentre in the detailed information if the checkbox at Acct assignment changable then only you can modify the Account assignment category modification in PO, otherwise not possible.
rgds
gsc