Symptom
Error 'Resource not found for segment 'A_PurchaseOrderItemType'' happens when using patch option via odata service API API_PURCHASEORDER_PROCESS_SRV to change a PO.
Environment
SAP S/4HANA Cloud All Versions
Cause
Patch option can only be used for existing objects in system.
Resolution
Try to find out correct object in system and patch again, or use Post option to create an object basing on business process.
Keywords
KBA , MM-PUR-PO , Purchase Orders , Problem
Product
SAP S/4HANA Cloud 2202