How To Fix WN229 - Material & already exists as an exception

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 229

• Message text: Material & already exists as an exception

What causes this issue?

The material has already been specified as an exception from
inventory management for material group assignment.

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 WN229 - Material & already exists as an exception ?

  The SAP error message WN229 indicates that a material already exists as an exception in the system. This typically occurs in the context of material management or inventory management processes, where the system is trying to create or modify a material that has already been flagged as an exception.
  Cause:
  
  Duplicate Material Entry: The material you are trying to create or modify already exists in the system, possibly with a different status or configuration.
  Material Status: The material may have been flagged for some reason (e.g., blocked, obsolete, etc.) which prevents further processing.
  Data Inconsistency: There may be inconsistencies in the data that lead the system to believe that the material is an exception.
  
  Solution:
  
  Check Existing Material: Verify if the material number you are trying to use already exists in the system. You can do this by using transaction codes like MM03 (Display Material) to check the material's status and details.
  Review Material Status: If the material exists, check its status. If it is blocked or marked as an exception, you may need to change its status or resolve the issue that caused it to be flagged.
  Correct Data Entry: Ensure that you are entering the correct material number and that there are no typographical errors.
  Consult with SAP Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting the SAP Help Portal for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material).
  Material Master Data: Understanding how material master data is structured and maintained in SAP can help prevent such errors.
  User Authorizations: Ensure that you have the necessary authorizations to create or modify materials in the system.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the WN229 error and take appropriate action to resolve it.