How To Fix SVMCRT_LOCKING021 - Cannot create unique lock owner; reason: &1 (return code = &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: SVMCRT_LOCKING - VMC Locking

• Message number: 021

• Message text: Cannot create unique lock owner; reason: &1 (return code = &2)

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SVMCRT_LOCKING021 - Cannot create unique lock owner; reason: &1 (return code = &2) ?

  The SAP error message SVMCRT_LOCKING021 indicates that the system is unable to create a unique lock owner due to a specific reason, which is represented by &1, and a return code represented by &2. This error typically occurs in the context of SAP's locking mechanism, which is used to ensure data consistency during concurrent access.
  Causes:
  
  Lock Table Overflow: The lock table may be full, preventing new locks from being created.
  Invalid Lock Owner: The system may be trying to create a lock with an invalid or non-existent owner.
  Database Issues: There may be underlying database issues that are preventing the lock from being created.
  Configuration Issues: Incorrect configuration settings in the SAP system related to locking mechanisms.
  System Performance: High load on the system can lead to delays or failures in lock creation.
  
  Solutions:
  
  
  Check Lock Table Size:
  
  Use transaction code SM12 to check the current locks and see if the lock table is full. If it is, consider increasing the size of the lock table in the system profile parameters.
  
  
  
  Clear Unused Locks:
  
  In transaction SM12, you can delete old or unnecessary locks that may be occupying space in the lock table.
  
  
  
  Review Lock Owner:
  
  Ensure that the lock owner being used is valid and correctly configured. Check for any typos or misconfigurations in the code that is attempting to create the lock.
  
  
  
  Check System Performance:
  
  Monitor system performance and resource usage. If the system is under heavy load, consider optimizing performance or scheduling heavy jobs during off-peak hours.
  
  
  
  Review Configuration:
  
  Check the SAP system configuration related to locking. Ensure that all parameters are set correctly according to SAP best practices.
  
  
  
  Database Health Check:
  
  Perform a health check on the database to ensure that it is functioning correctly. Look for any errors or issues that may be affecting the locking mechanism.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message. There may be patches or updates available that resolve the issue.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. Provide them with the error message details, including the return code and any relevant logs.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM12: Display and manage locks.
  SM21: Check system logs for any related errors.
  ST22: Analyze dumps that may provide more context on the error.
  
  
  
  SAP Documentation: Review SAP documentation related to locking mechanisms and error handling for more in-depth understanding.
  
  
  By following these steps, you should be able to diagnose and resolve the issue related to the SVMCRT_LOCKING021 error message in your SAP system.