How To Fix PSSC_BUFFER204 - Enqueue: At least one object has not been locked

SAP Error Message - Details

• Message type: E = Error

• Message class: PSSC_BUFFER - Social Services Buffer

• Message number: 204

• Message text: Enqueue: At least one object has not been locked

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message PSSC_BUFFER204 - Enqueue: At least one object has not been locked ?

  The SAP error message PSSC_BUFFER204 indicates that there is an issue with the enqueue mechanism in SAP, specifically that at least one object has not been locked. This can occur in various scenarios, particularly when multiple users or processes are trying to access or modify the same data concurrently.
  Cause:
  
  
  Concurrency Issues: The error typically arises when a transaction attempts to lock an object that is already locked by another transaction. This can happen if:
  
  Another user is currently processing the same data.
  A previous transaction did not release the lock properly.
  There is a timeout or deadlock situation.
  
  
  
  Configuration Issues: Sometimes, the configuration of the enqueue server or the application may not be set up correctly, leading to locking issues.
  
  
  System Performance: High system load or performance issues can also lead to delays in locking mechanisms, causing this error.
  
  
  Solution:
  
  
  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 necessary, you can delete the lock entries (with caution) if they are stale or no longer needed.
  
  
  Wait and Retry: If the lock is held by another user, you may need to wait for that user to complete their transaction and release the lock. You can also implement a retry mechanism in your code to handle temporary locking issues.
  
  
  Review Code Logic: If you are developing custom code, ensure that your locking logic is correct. Make sure that locks are acquired and released properly in your code.
  
  
  Check System Performance: Monitor the system performance to ensure that it is not overloaded. If necessary, optimize the performance of the system or the specific transactions that are causing locking issues.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP Support for further assistance.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: Check system logs for any related errors or warnings.
  SM37: Monitor background jobs to see if any jobs are causing locks.
  
  
  
  Enqueue Mechanism: Understand how the enqueue mechanism works in SAP, as it is crucial for managing concurrent access to data.
  
  
  Performance Tuning: Regularly monitor and tune the performance of your SAP system to minimize locking issues.
  
  
  By following these steps, you should be able to diagnose and resolve the PSSC_BUFFER204 error effectively.