How To Fix /SAPAPO/DMRES023 - Shift definition &1 has been locked by user &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/DMRES -

• Message number: 023

• Message text: Shift definition &1 has been locked by user &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/DMRES023 - Shift definition &1 has been locked by user &2 ?

  The SAP error message /SAPAPO/DMRES023 indicates that a shift definition in the SAP Advanced Planning and Optimization (APO) module is locked by a specific user. This typically occurs when a user is currently editing or has opened a shift definition, preventing other users from making changes to it simultaneously.
  Cause:
  
  User Lock: The shift definition is being edited by another user, which locks the definition for other users to prevent conflicting changes.
  Session Timeout: Sometimes, if a user has an active session that has not been properly closed, it may still hold a lock on the shift definition.
  System Error: Occasionally, system errors or crashes can leave a lock in place even if the user is no longer actively using the system.
  
  Solution:
  
  Wait and Retry: If the shift definition is locked by another user, you may need to wait until that user has finished their work and released the lock.
  Identify the User: You can check which user has locked the shift definition. This can typically be done through transaction codes like SM12 (for lock entries) or SM21 (for system logs).
  Contact the User: If possible, contact the user who has the lock and ask them to release it.
  Release the Lock: If the user is no longer available (e.g., they have logged off or their session has crashed), a system administrator can manually release the lock using transaction SM12. However, this should be done with caution to avoid data inconsistencies.
  Check for Background Jobs: Sometimes, background jobs may also hold locks. Ensure that no background processes are running that could be causing the lock.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for any related issues.
  SE11: To check the data dictionary for the structure of the shift definition.
  
  
  Documentation: Refer to SAP Help documentation for more details on managing locks and understanding the locking mechanism in SAP.
  User Training: Ensure that users are trained on how to properly close sessions and avoid leaving locks on objects they are working with.
  
  If the issue persists after trying the above solutions, it may be necessary to consult with your SAP Basis team or SAP support for further assistance.