How To Fix PSSC_TOOLS153 - Enqueue error; at least one object is locked

SAP Error Message - Details

• Message type: E = Error

• Message class: PSSC_TOOLS - Message Class for Periods & Due Date Tools

• Message number: 153

• Message text: Enqueue error; at least one object is locked

What causes this issue?

The system tried to enqueue more than one object in change mode.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check whether one of the objects you are trying to access is already in
use.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PSSC_TOOLS153 - Enqueue error; at least one object is locked ?

  The SAP error message PSSC_TOOLS153 indicates that there is an enqueue error, meaning that at least one object that the system is trying to access is currently locked. This can happen in various scenarios, such as when multiple users or processes are trying to access the same data simultaneously, or when a previous transaction did not release the lock properly.
  Causes:
  
  Concurrent Access: Multiple users or processes are trying to access the same object simultaneously, leading to a lock.
  Unreleased Locks: A previous transaction may have failed or been terminated without releasing the lock on the object.
  Long-running Transactions: A transaction that takes a long time to complete may hold a lock for an extended period, preventing other transactions from accessing the same object.
  System Errors: Issues in the system or application logic that lead to improper handling of locks.
  
  Solutions:
  
  
  Identify the Lock:
  
  Use transaction code SM12 to view the list of locks in the system. You can filter by user or object to find the specific lock causing the issue.
  Check the lock entries and identify the user or process that holds the lock.
  
  
  
  Release the Lock:
  
  If you identify a lock that is no longer needed (e.g., from a user who has logged off or a transaction that has failed), you can manually delete the lock entry in SM12. Be cautious when doing this, as it may affect other users or processes.
  
  
  
  Check for Long-running Transactions:
  
  Use transaction code SM50 or SM66 to monitor active processes and identify any long-running transactions that may be holding locks.
  
  
  
  Review Application Logic:
  
  If the issue is recurring, review the application logic to ensure that locks are being managed properly. Ensure that locks are released after the necessary operations are completed.
  
  
  
  Increase Lock Timeout:
  
  If appropriate, consider increasing the lock timeout settings in the system configuration to allow longer wait times for locks to be released.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address specific issues related to this error message.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM50: Monitor active processes.
  SM66: Monitor processes across the entire system.
  
  
  
  SAP Documentation: Refer to SAP Help documentation for more details on enqueue mechanisms and lock management.
  
  
  Performance Monitoring: Regularly monitor system performance and lock situations to prevent future occurrences of this error.
  
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.