How To Fix WG028 - Req. no. &, item &: doc. type, supplier and supplying plant not found

WG028 - Overview

• Message type: E = Error

• Message class: WG - Messages for store order and investment buy

• Message number: 028

• Message text: Req. no. &, item &: doc. type, supplier and supplying plant not found

What causes this issue?

Neither document type nor source of supply could be determined
using the transmitted data. The order item cannot therefore be
identified.

System Response

The order item is not posted.

How to fix this error?

Transmit useful data.

Error message extract from SAP system. Copyright SAP SE.

WG028 - Details

• Certainly! Here's a detailed explanation for the SAP error message WG028:
  
  SAP Error Message: WG028
  Text: Req. no. &, item &: doc. type, supplier and supplying plant not found
  
  Cause
  This error occurs during the processing of a goods receipt or invoice verification when the system cannot find a matching purchase order or scheduling agreement item based on the combination of:
  
  Document type
  Supplier
  Supplying plant
  
  Specifically, the system tries to find a reference document (like a purchase order or scheduling agreement) for the given requisition number and item, but fails because the combination of document type, supplier, and supplying plant does not exist or is inconsistent in the system.
  Common causes include:
  
  The purchase order or scheduling agreement does not exist or has been deleted.
  The document type used in the transaction is incorrect or inconsistent.
  The supplier or supplying plant data in the transaction does not match the data in the purchase order.
  The requisition number or item number is incorrect