I am trying to send an Order Confirmation (OC) using IDoc > ARBCIG_ORDRSP with Reject status lines using the integration SAP Business Network > SAP Ariba SAP Integration Suite, managed gateway for spend management and SAP Business Network (CIG) > SAP Enterprise Resource Planning (SAP ERP) which fails in Tcode WE02 with data errors.

• To process OC's with rejected line items that AN sends, you must implement the SAP Note 890812 - EDI inbound processing ORDRSP; reversing a purchase order item on your SAP ERP system.
• You must also implement the custom exit MM06E001 to prevent errors while processing OC containing line items with the Rejected status from AN. For more information, see the section, How to implement the customer exit to process comments and rejected line item in the Managed Gateway for Spend&Network configuration guide.
  
  If issue persists even after implementation of above recommendations, please raise an SAP OSS incident under component MM-PUR-GF-WOF following KBA How do I create an SAP OSS incident?

SAP ERP does not support OC that contain line items with the Rejected status.

• Please refer to Prerequisites and restrictions documented in SAP Integration Suite, managed gateway for spend management and SAP Business Network overview guide.
• Please also refer to SAP Notes 890812 - EDI inbound processing ORDRSP reversing a purchase order item and 3061890 - posting IDoc ARBCIG_ORDRSP with "Reject" status in ERP

SAP Integration Suite Managed Gateway > Managed Gateway for Business Network