Solution : https://service.sap.com/sap/support/notes/1494600 (SAP Service marketplace login required)
Key words :
prerequisites goods receipt based invoice verification, purchasing info record, interface parameters poitem, po item level, poitemx-gr_basediv = 'x', set gr_basediv = 'x', poitem-gr_basediv = ' ', release level, purchase order, filled correctly
Related Notes :
| 1438316 | BAPI_PO_CHANGE - GR/IR indicators are not transferred |