How To Fix /SAPAPO/SCC146 - Database lock for model & cannot be released

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/SCC -

• Message number: 146

• Message text: Database lock for model & cannot be released

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/SCC146 - Database lock for model & cannot be released ?

  The SAP error message /SAPAPO/SCC146 Database lock for model & cannot be released typically occurs in the SAP Advanced Planning and Optimization (APO) module when there is a database lock on a model that prevents certain operations from being completed. This can happen for various reasons, such as concurrent processes trying to access the same model or a previous process not releasing the lock properly.
  Causes:
  
  Concurrent Access: Multiple users or processes are trying to access or modify the same model simultaneously, leading to a lock.
  Long-Running Transactions: A transaction that takes too long to complete may hold a lock longer than expected.
  Unfinished Processes: A previous process that was interrupted or did not complete may leave a lock in place.
  System Errors: Issues with the database or the application server can also lead to locks not being released.
  
  Solutions:
  
  Identify the Lock: Use transaction codes like SM12 (for lock entries) to identify which user or process is holding the lock on the model.
  Release the Lock: If you have the necessary authorizations, you can manually delete the lock entry in SM12. Be cautious when doing this, as it may affect other users or processes.
  Check for Long-Running Jobs: Use transaction SM37 to check for any long-running jobs that might be holding the lock. If you find any, you may need to wait for them to complete or terminate them if appropriate.
  Review System Logs: Check the system logs (SM21) for any errors or warnings that might indicate underlying issues causing the lock.
  Restart the Application Server: In some cases, restarting the application server can help clear locks that are not being released properly.
  Consult Basis Team: If the issue persists, it may be necessary to involve your SAP Basis team to investigate further, as they can check for database-level locks or issues.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: System log for monitoring system messages.
  SM37: Job monitoring to check for long-running jobs.
  
  
  Documentation: Refer to SAP Notes and documentation related to database locks and performance tuning in APO.
  Best Practices: Implement best practices for managing concurrent access to models in APO, such as scheduling jobs during off-peak hours or using appropriate locking mechanisms.
  
  By following these steps, you should be able to diagnose and resolve the issue related to the /SAPAPO/SCC146 error message.