How To Fix APPL_COMMON024 - Exactly-once request cannot be locked: &1 (error code &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: APPL_COMMON -

• Message number: 024

• Message text: Exactly-once request cannot be locked: &1 (error 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message APPL_COMMON024 - Exactly-once request cannot be locked: &1 (error code &2) ?

  The SAP error message APPL_COMMON024 indicates that a request that is supposed to be processed exactly once cannot be locked. This typically occurs in scenarios where the system is trying to ensure that a particular operation is executed only once, but it encounters a locking issue.
  Cause:
  
  Concurrency Issues: The error often arises when multiple processes or transactions are trying to access the same resource simultaneously, leading to a locking conflict.
  Database Locking: The database may have a lock on the resource that the request is trying to access, preventing it from being processed.
  Long-running Transactions: If a transaction is taking too long to complete, it may hold locks longer than expected, causing other requests to fail.
  Configuration Issues: There may be misconfigurations in the system that affect how locks are managed.
  
  Solution:
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. Identify if there are any locks held by other users or processes that are causing the conflict.
  Release Locks: If you find unnecessary locks, you can release them (if you have the necessary permissions) or ask the user holding the lock to release it.
  Review Long-running Transactions: Investigate any long-running transactions that may be holding locks. Optimize these transactions if possible.
  Adjust Lock Timeout Settings: If applicable, consider adjusting the lock timeout settings in your SAP system to reduce the likelihood of encountering this error.
  Check for System Updates: Ensure that your SAP system is up to date with the latest patches and updates, as some locking issues may be resolved in newer versions.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: 
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for any related errors or warnings.
  ST22: To analyze dumps that may provide more context on the error.
  
  
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance, providing them with the error details and any relevant logs.
  
  By following these steps, you should be able to diagnose and resolve the APPL_COMMON024 error in your SAP system.