How To Fix 5A064 - Locking is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: 5A - Basis Personnel Management

• Message number: 064

• Message text: Locking is not possible

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 5A064 - Locking is not possible ?

  The SAP error message 5A064 - Locking is not possible typically occurs when there is an issue with the locking mechanism in the SAP system. This can happen for various reasons, including:
  Causes:
  
  Database Lock Conflicts: Another user or process may have locked the object you are trying to access, preventing your transaction from acquiring the necessary lock.
  Lock Table Overflow: The lock table may be full, which means that no additional locks can be created until some are released.
  System Configuration Issues: There may be configuration issues in the SAP system that affect how locks are managed.
  Transaction Errors: The transaction you are trying to execute may have errors that prevent it from acquiring a lock.
  
  Solutions:
  
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. You can identify if another user or process is holding a lock on the object you are trying to access. If appropriate, you can delete the lock entries (be cautious with this step, as it may affect other users).
  
  
  Increase Lock Table Size: If the lock table is full, you may need to increase its size. This can be done by adjusting the profile parameters in the SAP system. The parameter to look for is enque/table_size.
  
  
  Review System Logs: Check the system logs (transaction SM21) for any related errors or warnings that might provide more context about the locking issue.
  
  
  Restart the Transaction: Sometimes, simply restarting the transaction or logging out and back into the system can resolve temporary locking issues.
  
  
  Contact Basis Team: If the issue persists, it may be necessary to involve your SAP Basis team to investigate further, especially if it involves system configuration or performance issues.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: System log for monitoring and troubleshooting.
  SM37: Check background jobs that may be causing locks.
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to locking problems. You can search for relevant notes in the SAP Support Portal.
  
  
  Documentation: Review SAP documentation on locking mechanisms and best practices for managing locks in the system.
  
  
  By following these steps, you should be able to diagnose and resolve the locking issue associated with the error message 5A064.