When sending a purchase order from an ERP system to SAP Business Network, it fails in SAP Integration Suite, Managed Gateway for Spend&Netwok with the error: No PO matching for update​/cancel.

The order was sent with type="update" or type="delete" in the cXML, but there is no previous version of the PO on the SAP Business Network or the reference document is missing.

There are two possible solutions for this issue, depending on if the purchase order you are trying to send is a new one, or a change order:

1. If the PO is a new purchase order, you need to send it with type="new"
2. Otherwise, if it's a change order (update or delete), you must add a reference document on the cXML, as the example below:

<DocumentReference payloadID="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"/>

To learn more about the DocumentReference cXML element, see:

• Change orders in the Change Orders
  Path: https://help.sap.com > SAP Business Network for Supply Chain > cXML Solutions Guide > Purchase Orders > Change Orders
• Later Status Changes in the cXML Reference Guide
  Path: https://help.sap.com > SAP Business Network for Supply Chain > cXML Reference Guide
  
  

If you are sending your PO from Ariba Buying and Invoicing (P2P), refer to 3176746 - Error: "No PO matching for update/cancel" when sending PO from P2P to SAP Business Network instead.

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