How To Fix MQ026 - Data is locked by another user

SAP Error Message - Details

• Message type: E = Error

• Message class: MQ - Messages for Euro Changeover Package

• Message number: 026

• Message text: Data is locked by another 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.

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 MQ026 - Data is locked by another user ?

  The SAP error message MQ026, which states "Data is locked by another user," typically occurs when a user attempts to access or modify data that is currently being used or edited by another user. This locking mechanism is a part of SAP's data integrity and concurrency control to prevent conflicts and ensure that data remains consistent.
  Causes:
  
  Concurrent Access: Another user is currently editing or processing the same data.
  Long-running Transactions: A transaction that takes a long time to complete may hold locks longer than expected.
  Uncommitted Changes: If a user has made changes but has not yet saved or committed them, the data remains locked.
  System Errors: Occasionally, system errors or crashes can leave locks in place that should have been released.
  
  Solutions:
  
  Wait and Retry: If the lock is temporary, waiting for the other user to finish their transaction may resolve the issue.
  Identify the Lock: Use transaction codes like SM12 (Display and Delete Locks) to identify which user or session is holding the lock. You can then communicate with that user to resolve the issue.
  Release the Lock: If you have the necessary authorizations, you can manually delete the lock entry in SM12. However, this should be done with caution, as it may lead to data inconsistency.
  Check for Long Transactions: Review the system for any long-running transactions that may be causing locks. Encourage users to complete their transactions promptly.
  System Monitoring: Implement monitoring tools to track and manage locks more effectively, ensuring that users are aware of potential conflicts.
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for any related errors or warnings.
  SM37: To monitor background jobs that may be causing locks.
  
  
  
  User Communication: Encourage users to communicate when they are working on shared data to avoid conflicts.
  
  
  Training: Provide training for users on how to handle data locks and the importance of completing transactions promptly.
  
  
  Performance Tuning: Regularly review and optimize system performance to minimize the duration of locks.
  
  
  By understanding the cause of the MQ026 error and implementing these solutions, you can effectively manage data locks in SAP and minimize disruptions to user activities.