How To Fix MM639 - Field & is lock-relevant and not changeable because material is locked

SAP Error Message - Details

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 639

• Message text: Field & is lock-relevant and not changeable because material is locked

What causes this issue?

The field &V1& has been defined as lock-relevant in Customizing for the
<LS>Material Master</> in <DS:SIMG.SIMG_CFMENUOLMSFIX>Define
Lock-Relevant Fields</>, and the material master record has been
locked. As a result, this field can no longer be changed and is not
ready for input.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM639 - Field & is lock-relevant and not changeable because material is locked ?

  The SAP error message MM639 indicates that a specific field in the material master record is lock-relevant and cannot be changed because the material is currently locked. This typically occurs when another user or process is editing the material master data, or when the material is in a state that prevents changes (e.g., it is being processed in a transaction).
  Cause:
  
  Material Locking: The material master record is locked by another user or transaction. This can happen if someone is currently editing the material or if a background job is processing it.
  Transaction State: The material may be in a state that does not allow changes, such as being part of a purchase order, production order, or other transactions.
  User Permissions: The user may not have the necessary permissions to change the material master data.
  
  Solution:
  
  
  Check for Locks:
  
  Use transaction code SM12 to check for locks on the material. Look for entries related to the material number and see if another user is holding a lock.
  If you find a lock that is no longer needed, you can ask the user to release it or, if appropriate, you can delete the lock (be cautious with this approach).
  
  
  
  Wait for Release: If the lock is due to another user editing the material, you may need to wait until they finish their changes and release the lock.
  
  
  Check Transaction Status: Ensure that the material is not being processed in any other transactions. If it is, you may need to complete or cancel those transactions before making changes.
  
  
  User Permissions: Verify that you have the necessary authorizations to change the material master data. If not, contact your SAP administrator to request the appropriate permissions.
  
  
  Use Change Mode: Ensure you are in the correct mode for making changes. For example, if you are trying to change a material in display mode, switch to change mode.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM02: Change Material Master
  MM03: Display Material Master
  SM12: Display and Delete Locks
  MM01: Create Material Master
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to material locking and the MM639 error.
  
  
  Documentation: Review SAP documentation for material master data management to understand the implications of locks and how to manage them effectively.
  
  
  By following these steps, you should be able to resolve the MM639 error and successfully make the necessary changes to the material master record.