How To Fix /CFG/ACTIVATION135 - Table is already locked by another user.

SAP Error Message - Details

• Message type: E = Error

• Message class: /CFG/ACTIVATION -

• Message number: 135

• Message text: Table is already locked by another user.

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /CFG/ACTIVATION135 - Table is already locked by another user. ?

  The SAP error message /CFG/ACTIVATION135 Table is already locked by another user typically occurs when a user attempts to activate or modify a configuration table that is currently locked by another user or process. This locking mechanism is in place to prevent data inconsistencies and ensure that only one user can make changes to a configuration at a time.
  Cause:
  
  Concurrent Access: Another user or process is currently accessing the same configuration table, which leads to a lock being placed on it.
  Long-Running Transactions: A transaction that takes a long time to complete may hold the lock longer than expected.
  Unfinished Sessions: A previous session may not have been properly closed, leaving the table locked.
  System Issues: Occasionally, system issues or bugs can lead to locks not being released properly.
  
  Solution:
  
  Wait and Retry: If the lock is temporary, waiting for a few moments and then retrying the operation may resolve the issue.
  Identify the Locking User:
  
  Use transaction code SM12 to view the list of locks in the system. You can filter by the table name or user to identify who is holding the lock.
  If you find the user who is holding the lock, you can contact them to see if they can release it.
  
  
  Release the Lock: If the locking user is not available or the session is no longer active, you may need to release the lock manually:
  
  In transaction SM12, select the lock entry and choose the option to delete it. Be cautious with this step, as it may lead to data inconsistencies if the other user is still working on it.
  
  
  Check for Long-Running Transactions: Use transaction SM66 to monitor active processes and identify any long-running transactions that may be holding locks.
  System Restart: In extreme cases, if locks are not being released properly due to a system issue, a system restart may be necessary. This should be done with caution and typically requires coordination with your Basis team.
  
  Related Information:
  
  Lock Management: Understanding how SAP handles locks can help in troubleshooting. Locks are managed at the database level, and SAP uses various types of locks (exclusive, shared) depending on the operation being performed.
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM66: Monitor global work processes.
  SM21: Check system logs for any related errors or warnings.
  
  
  Documentation: Refer to SAP Help documentation for more details on lock management and troubleshooting.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult SAP support for further assistance.