Solution : https://service.sap.com/sap/support/notes/1438316 (SAP Service marketplace login required)
Key words :
account assignment category, gr indicator, system ignores, input data, terms wepos, poitem-gr_ind, poitem-ir_ind, poitem-gr_non_val, program error, attached corrections
Related Notes :
| 1494600 | BAPI_PO_CHANGE: GR_BASEDIV will be set |
| 1482028 | BAPI_PO_CREATE1: MEPO 047 when changing account assignment |
| 1464524 | Error ME083 unexpected during PO transfer |
| 1435989 | Account assignment data not transferred from interface |