Perform some search at scn on BAdI ME_PROCESS_PO_CUST methods PROCESS_ITEM and PROCESS_ACCOUNT.
- use get_data/set_data to read and change current values (im_item or im_account)
- from item you can access accounting(s) with method get_accountings from accounting you get access to item thru method get_item.
- use macros mmpur_metafield, mmmf and mmpur_message_forced to raise error.
Regards,
Raymond