While sending a Purchase Order to SAP Business Network, my purchase order fails with the below error: PO-9: Invalid cXML response.

The supplier's commerce eXtensible Markup Language (cXML) application is sending back an invalid cXML response for the order posted by Ariba.

The following is an example of an invalid cXML response:

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE cXML SYSTEM "http://xml.cxml.org/schemas/cXML/1.1.010/cXML.dtd"><Response>
<Status code="500" text="Unrecognised message request"/>
</Response>

The supplier's application needs to send back a valid 200 acknowledgment for the order posted by Ariba.

The following is an example of a valid 200 response:

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE cXML SYSTEM "http://xml.cXML.org/schemas/cXML/1.2.021/cXML.dtd"> <cXML payloadID="1232424-testpayloadid234525"xml:lang="en-CA" timestamp="2016-10-12T18:39:42-08:00">
<Response>
<Status code="200" text="OK"/>
</Response> </cXML>

See Purchase orders are failing to reach the supplier integrated system (via cXML), but can be seen in the supplier's Inbox for a list of common similar errors and their resolution.

SAP Business Network for Procurement & Supply Chain > Transaction Documents > Transaction (Purchase Orders, Ship Notices & Goods Receipts)