Solution : https://service.sap.com/sap/support/notes/589411 (SAP Service marketplace login required)
Key words :
object type '/afs/b2012 create afs purchase order', object type 'bus2012 -purchase order' passes, afs purchasing /afs/bapi_po_create afspurchaseorder, bapi_requisition_release bapi_requisition_release_gen bapi_requisition_reset_release bapi_requisition_reset_rel_gen, createfromdata bapi_requisition_create purchaserequisition, createfromdata bapi_requisition_change purchaserequisition, change bapi_requisition_delete purchaserequisition, createfromdata1 bapi_po_change purchaseorder, bapi calls bapi_po_create, /afs/bapi_po_create
Related Notes :
1168174 | Incorrect value of /AFS/SZIN and /AFS/CTIN in EKET |
982032 | PO create using BAPI or ME21N does not consider DECAN/ANDEC |
934129 | FAQ's on AFS-Purchasing |