How To Fix DT668 - Technical settings for & already locked by another user

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 668

• Message text: Technical settings for & already locked by another user

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT668 - Technical settings for & already locked by another user ?

  The SAP error message DT668, which states "Technical settings for & already locked by another user," typically occurs when a user attempts to modify the technical settings of a database table or an object that is currently locked by another user. This locking mechanism is in place to prevent concurrent modifications that could lead to data inconsistencies.
  Cause:
  
  Concurrent Access: Another user is currently editing the technical settings of the same object (e.g., a database table).
  Session Lock: The user may have an open session that is holding a lock on the object.
  Long-Running Transactions: A transaction that takes a long time to complete may hold the lock longer than expected.
  System Issues: Occasionally, system issues or bugs can lead to locks not being released properly.
  
  Solution:
  
  Wait and Retry: If the lock is held by another user, the simplest solution is to wait until that user has finished their work and released the lock. You can then retry your operation.
  Identify the Locking User:
  
  Use transaction code SM12 to view the list of locks in the system. You can check which user is holding the lock on the object.
  If necessary, you can contact the user holding the lock to coordinate the release.
  
  
  Release the Lock: If you have the necessary authorizations and it is appropriate to do so, you can manually delete the lock entry in SM12. However, this should be done with caution, as it may disrupt the other user's work.
  Check for Long-Running Transactions: Use transaction code SM66 to monitor active processes in the system. If you identify a long-running transaction that is holding the lock, you may need to investigate further.
  System Restart: In rare cases, if the lock persists and cannot be resolved, a system restart may be necessary to clear any stale locks. This should be done as a last resort and with proper planning.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM66: Monitor global work processes.
  SE11: Data Dictionary, where you can view and edit technical settings.
  
  
  User Communication: If you are in a collaborative environment, communicate with your team members to avoid conflicts when working on the same objects.
  Documentation: Refer to SAP documentation or support notes for more detailed information on handling locks and troubleshooting related issues.
  
  By following these steps, you should be able to resolve the DT668 error and proceed with your work in SAP.