Solution : https://service.sap.com/sap/support/notes/187687 (SAP Service marketplace login required)
Key words :
transaction_begin transaction_abort transaction_end note, changing purchase orders, enjoysap purchase order, sap service marketplace, function module bapi_transaction_commit, transaction_end function modules, general design guidelines, attached correction instructions, bapi_po_create function module, attachment tab page
Related Notes :
1262902 | Problem EHSWA_100_IOTAB_TO_BUF_REREAD when using old PO BAPI |
1231998 | Problem w/purchase order (using current purchase order BAPI) |
1054029 | Calling the new/current purchase order BAPI |
967440 | BAPI_REQUISITION_RELEASE(_GEN) with COMMIT WORK |
878978 | Problems with locks after purchase order |
420646 | EnjoySAP purchase orders via BAPI not updated in SE37 |
160706 | No exceptions in BAPI_PO_CREATE |
131838 | Collective note for BAPIs w/ 'Commit Work' command |