How To Fix 1R491 - Object ID &1 could not be locked

SAP Error Message - Details

• Message type: E = Error

• Message class: 1R - SAP Knowledge Provider

• Message number: 491

• Message text: Object ID &1 could not be locked

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 1R491 - Object ID &1 could not be locked ?

  The SAP error message 1R491 indicates that an object with the specified ID could not be locked. This typically occurs in scenarios where multiple users or processes are trying to access or modify the same object simultaneously, leading to a conflict in locking mechanisms.
  Causes:
  
  Concurrent Access: Another user or process is currently accessing the object, preventing your session from obtaining a lock.
  Long-Running Transactions: A transaction that takes a long time to complete may hold the lock longer than expected.
  System Issues: There may be issues with the SAP system itself, such as database locks or inconsistencies.
  User Permissions: The user may not have the necessary permissions to lock the object.
  Background Jobs: A background job may be holding the lock on the object.
  
  Solutions:
  
  Wait and Retry: If the object is locked by another user, wait for a while and then try again.
  Identify Locking User: Use transaction SM12 to check for locks on the object. You can see which user or process is holding the lock and take appropriate action.
  Release Locks: If you have the necessary permissions, you can manually release the lock from transaction SM12. Be cautious with this approach, as it may disrupt other users.
  Check Background Jobs: Use transaction SM37 to check if any background jobs are running that might be holding the lock.
  Review User Permissions: Ensure that the user has the necessary permissions to access and lock the object.
  System Health Check: If the issue persists, it may be necessary to check the overall health of the SAP system, including database performance and configuration.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM37: To monitor background jobs.
  SM21: To check system logs for any related errors.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to locking mechanisms.
  Documentation: Review SAP documentation for details on object locking and transaction management.
  
  If the problem continues after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.