Solution : https://service.sap.com/sap/support/notes/809423 (SAP Service marketplace login required)
Key words :
transferred technical parameters, purchase order, terms purchaseorder, no_authority reason, program error, solution implement, program correction, bapi_po_create1, bapi_po_change, createfromdata1
Related Notes :
842320 | BAPI_PO_CREATE1: Authorization check on PReq |
797454 | BAPI_PO_CHANGE Technical fields overwritten with space |