Solution : https://service.sap.com/sap/support/notes/693474 (SAP Service marketplace login required)
Key words :
symptom bapi_po_change terminates processing, system displays error message 06436, import structure poitem, service items, limit items, item category, purchase order, external service, correction instructions, terms purchaseorder
Related Notes :
| 630097 | BAPI_PO_CHANGE: Processing several service items |