The Invoice is PO backed (based on PO#/Supplier) but an Invoice line passed cannot be found on the Coupa PO.
How do I fix it?
Forward the invoice to the supplier team for confirmation of the extra PO line.
Search for the PO# in the Coupa instance and confirm the extra PO line with the information from the cXML Error Notification.
<cXML xml:lang="en-US" timestamp="2015-03-23T18:28:13+00:00" payloadID="20150323 182758.454"> <Response> <Status text="Expectation Failed" code="417">Invalid order/document reference. [Could not find order header 12471, order line num 0]</Status> </Response> </cXML>