How To Fix WY148 - External manufacturer number &1; no supplier found

WY148 - Overview

• Message type: E = Error

• Message class: WY - Supplier Master

• Message number: 148

• Message text: External manufacturer number &1; no supplier found

What causes this issue?

You wanted to determine data from the vendor master for external
manufacturer number &V1&. However, no data exists in the vendor master
for this number.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Please use another external manufacturer number.

Error message extract from SAP system. Copyright SAP SE.

WY148 - Details

• Certainly! Here's a detailed explanation for the SAP error message WY148: External manufacturer number &1; no supplier found:
  
  Error Message
  WY148: External manufacturer number &1; no supplier found
  
  Cause
  This error occurs when SAP tries to find a supplier (vendor) master record based on an external manufacturer number provided in a process (such as in procurement, production, or quality management), but no corresponding supplier record exists in the system.
  
  The external manufacturer number is typically a reference number used by the customer or external system to identify a supplier.
  SAP attempts to map this external number to an internal supplier (vendor) master record.
  If the mapping or master data is missing or incorrect, SAP cannot find the supplier, triggering this error.
  
  
  When does it occur?
  
  During procurement processes involving external manufacturers.
  When creating or processing purchase orders, contracts, or quality notifications referencing an external manufacturer.
  In integration scenarios where external manufacturer numbers are used to identify suppliers.
  
  
  Solution
  
  
  Check Vendor Master Data:
  
  Verify if