How To Fix /SAPAPO/TSM159 - Planning object structure locked by user '&'

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/TSM -

• Message number: 159

• Message text: Planning object structure locked by user '&'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/TSM159 - Planning object structure locked by user '&' ?

  The SAP error message /SAPAPO/TSM159 indicates that a planning object structure is currently locked by a specific user (denoted by &). This typically occurs in the context of SAP Advanced Planning and Optimization (APO) when a user is trying to access or modify a planning object that is already being used or modified by another user.
  Cause:
  
  User Lock: The planning object structure is locked by another user who is currently working on it. This is a common scenario in collaborative environments where multiple users may be accessing the same data.
  Session Timeout: Sometimes, a user may have left a session open, causing the lock to persist even after they are no longer actively using the system.
  System Error: In rare cases, a system error or crash may leave a lock in place that should have been released.
  
  Solution:
  
  Wait and Retry: If the lock is temporary, waiting for the other user to finish their work and release the lock may be the simplest solution.
  Identify the User: Use transaction SM12 to check for locks in the system. You can see which user has locked the object and potentially contact them to ask them to release the lock.
  Release the Lock: If you have the necessary authorizations, you can manually delete the lock from transaction SM12. However, this should be done with caution, as it may disrupt the other user's work.
  Check for Long-Running Transactions: If the lock persists for an extended period, investigate if there are any long-running transactions that may be causing the lock.
  System Administration: If the issue is recurrent, it may be worth discussing with your SAP Basis team to ensure that locks are being managed properly and to investigate any underlying issues.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks in the system.
  SM21: To check system logs for any related errors or warnings.
  ST22: To check for dumps that may indicate underlying issues.
  
  
  Documentation: Refer to SAP Help documentation for more details on locking mechanisms in SAP APO.
  User Communication: Establish a protocol for users to communicate when they are working on shared planning objects to minimize conflicts.
  
  Best Practices:
  
  Encourage users to log off or release locks when they are done with their tasks.
  Implement a clear process for handling locks and conflicts in collaborative planning scenarios.
  Regularly monitor and manage locks to ensure system efficiency and user productivity.
  
  By following these steps, you should be able to resolve the /SAPAPO/TSM159 error and minimize its occurrence in the future.