How To Fix CK491 - Material master locked by user &

SAP Error Message - Details

• Message type: E = Error

• Message class: CK - Product Costing Messages

• Message number: 491

• Message text: Material master locked by user &

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CK491 - Material master locked by user & ?

  The SAP error message CK491 indicates that a material master record is locked by a user, preventing other users from making changes to that record. This typically occurs when a user is currently editing the material master or if a previous session did not close properly, leaving the record in a locked state.
  Cause:
  
  User Editing: The most common cause is that another user is currently editing the material master record.
  Session Timeout: If a user was editing the record and their session timed out or was terminated unexpectedly, the lock may not have been released.
  Background Jobs: Sometimes, background jobs that are processing material master data can also lock the record.
  System Errors: Occasionally, system errors or crashes can lead to locks not being released properly.
  
  Solution:
  
  
  Check User Lock: Use transaction code SM12 to check for locks on the material master. You can filter by the material number or the user ID to see who is holding the lock.
  
  If you find that a user is editing the record, you may need to wait until they finish or contact them to release the lock.
  
  
  
  Release Lock: If you determine that the lock is no longer needed (e.g., the user has left the session), you can manually delete the lock entry in SM12. However, this should be done with caution and typically requires appropriate authorizations.
  
  
  Check Background Jobs: Use transaction code SM37 to check if there are any background jobs that might be locking the material master. If you find any, you may need to wait for them to complete or contact the job owner.
  
  
  Restart Session: If you suspect that your own session is causing the lock, try logging out and logging back into SAP.
  
  
  Contact SAP Support: If the issue persists and you cannot identify the cause, it may be necessary to contact your SAP support team for further assistance.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage locks.
  SM37: Monitor background jobs.
  MM02: Change material master data (if you have the necessary access).
  
  
  
  User Authorization: Ensure that you have the necessary authorizations to view and manage locks in the system.
  
  
  Documentation: Refer to SAP Help documentation for more details on material master management and locking mechanisms.
  
  
  Best Practices: Encourage users to properly log out of sessions and to communicate when they are working on shared material master records to avoid locking issues.
  
  
  By following these steps, you should be able to resolve the CK491 error and manage material master locks effectively.