How To Fix CMT2156 - Revoking the lock for object & & & & is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: CMT2 - Add-On Version: Message Class in CM Environment

• Message number: 156

• Message text: Revoking the lock for object & & & & is not possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CMT2156 - Revoking the lock for object & & & & is not possible ?

  The SAP error message CMT2156, which states "Revoking the lock for object & & & & is not possible," typically occurs in the context of SAP's lock management system. This error indicates that the system is unable to release a lock on a specific object, which can lead to issues in processing transactions or accessing certain data.
  Causes:
  
  Lock Table Overflow: The lock table may be full, preventing new locks from being created or existing locks from being released.
  Long-Running Transactions: A transaction may be holding a lock for an extended period, preventing other processes from accessing the locked object.
  Deadlocks: There may be a deadlock situation where two or more transactions are waiting for each other to release locks.
  System Errors: There could be underlying system issues or bugs that are preventing the lock from being revoked.
  User Permissions: The user attempting to revoke the lock may not have the necessary permissions to do so.
  
  Solutions:
  
  Check Lock Entries: Use transaction code SM12 to view and manage lock entries. You can identify which user or process is holding the lock and take appropriate action.
  Release Locks: If you identify a lock that is no longer needed, you can manually delete it from the lock table using SM12. Be cautious when doing this, as it may affect ongoing transactions.
  Monitor Long-Running Transactions: Use transaction code SM66 or SM50 to monitor active processes and identify any long-running transactions that may be holding locks.
  Increase Lock Table Size: If the lock table is frequently full, consider increasing its size. This can be done by adjusting the profile parameters in the instance profile (e.g., enque/table_size).
  Check for Deadlocks: Investigate if there are any deadlocks occurring in the system. You can use transaction SM21 to check the system log for any deadlock messages.
  Review User Permissions: Ensure that the user has the necessary permissions to manage locks. This may involve checking roles and authorizations.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. SAP frequently updates its knowledge base with solutions for common problems.
  System Logs: Review system logs using transaction SM21 for any additional error messages or warnings that may provide context for the lock issue.
  Performance Monitoring: Regularly monitor system performance and lock management to prevent future occurrences of this error.
  
  If the issue persists after trying the above solutions, it may be necessary to consult with your SAP Basis team or SAP support for further assistance.