How To Fix /SAPAPO/LOC084 - Internal error in lock management

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/LOC -

• Message number: 084

• Message text: Internal error in lock management

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 /SAPAPO/LOC084 - Internal error in lock management ?

  The SAP error message /SAPAPO/LOC084 Internal error in lock management typically indicates an issue related to the locking mechanism within the SAP Advanced Planning and Optimization (APO) system. This error can occur due to various reasons, including:
  Causes:
  
  Lock Table Overflow: The lock table may be full, leading to an inability to acquire new locks.
  Database Issues: Problems with the underlying database can cause inconsistencies in lock management.
  System Performance: High system load or performance issues can lead to timeouts or failures in lock management.
  Programming Errors: Custom code or enhancements that improperly handle locks can trigger this error.
  Transport Issues: If there are issues with transports that affect the locking mechanism, it can lead to this error.
  
  Solutions:
  
  Check Lock Table: Use transaction code SM12 to check for existing locks. If the lock table is full, you may need to release unnecessary locks.
  System Performance Monitoring: Monitor system performance and check for any bottlenecks. You can use transaction codes like ST22 for dumps and SM21 for system logs.
  Database Consistency Check: Run database consistency checks to ensure there are no underlying issues affecting the lock management.
  Review Custom Code: If you have custom developments, review the code for proper lock handling. Ensure that locks are released appropriately.
  Restart Services: In some cases, restarting the relevant services or the entire system may resolve transient issues.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error. SAP frequently releases updates and patches that can resolve known issues.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for further assistance. Provide them with detailed logs and error messages for better diagnosis.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (for lock entries), SM21 (system log), and ST22 (dump analysis) to troubleshoot the issue effectively.
  SAP Documentation: Review SAP documentation related to lock management in APO for a deeper understanding of how locks are handled and potential pitfalls.
  Performance Tuning: Consider performance tuning of your SAP system to prevent future occurrences of this error.
  
  By following these steps, you should be able to diagnose and resolve the /SAPAPO/LOC084 Internal error in lock management error effectively.