How To Fix WN503 - Supplier &1 not maintained

SAP Error Message - Details

• Message type: E = Error

• Message class: WN - Plant master data maintenance (integrated)

• Message number: 503

• Message text: Supplier &1 not maintained

What causes this issue?

A vendor who has not been created in the system is assigned to the
plant.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WN503 - Supplier &1 not maintained ?

  The SAP error message WN503 "Supplier &1 not maintained" typically occurs in the context of procurement or inventory management when the system cannot find the supplier (vendor) information for a specific material or purchasing document. This error can arise in various scenarios, such as when trying to create a purchase order, a purchase requisition, or when processing goods receipts.
  Cause:
  
  Missing Vendor Master Data: The vendor (supplier) has not been created or maintained in the system for the specific purchasing organization or company code.
  Incorrect Vendor Assignment: The vendor may not be assigned to the material or may not be valid for the specific purchasing organization.
  Data Inconsistency: There may be inconsistencies in the vendor master data, such as missing or incorrect information.
  Inactive Vendor: The vendor may be marked as inactive or blocked in the system.
  
  Solution:
  
  
  Check Vendor Master Data:
  
  Go to the transaction code XK03 (Display Vendor) or MK03 (Display Vendor for Purchasing) to check if the vendor exists.
  Ensure that the vendor is maintained for the relevant purchasing organization and company code.
  
  
  
  Create or Maintain Vendor:
  
  If the vendor does not exist, create it using transaction code XK01 (Create Vendor) or MK01 (Create Vendor for Purchasing).
  If the vendor exists but is not maintained for the required purchasing organization, use XK02 (Change Vendor) or MK02 (Change Vendor for Purchasing) to add the necessary details.
  
  
  
  Check Material Master Data:
  
  Use transaction code MM03 (Display Material) to verify if the material is correctly linked to the vendor.
  Ensure that the purchasing view of the material master has the correct vendor assigned.
  
  
  
  Review Vendor Status:
  
  Check if the vendor is active and not blocked. If it is blocked, you may need to unblock it using XK02.
  
  
  
  Consult with Procurement Team:
  
  If you are unsure about the vendor details or the procurement process, consult with your procurement or purchasing team for further assistance.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  XK01, XK02, XK03: Vendor Master Data Maintenance
  MK01, MK02, MK03: Vendor Master Data for Purchasing
  MM03: Material Master Data Display
  
  
  
  Authorization: Ensure that you have the necessary authorizations to create or modify vendor master data.
  
  
  Documentation: Refer to SAP documentation or your organization's internal guidelines for managing vendor and material master data.
  
  
  By following these steps, you should be able to resolve the WN503 error and ensure that the supplier information is correctly maintained in the SAP system.