How To Fix TK864 - Object & & & could not be locked (enqueue locks)

SAP Error Message - Details

• Message type: E = Error

• Message class: TK - Transport Organizer

• Message number: 864

• Message text: Object & & & could not be locked (enqueue locks)

What causes this issue?

The object &V1& &V2& &V3& could not be locked (enqueue locks).

System Response

The action was terminated.

How to fix this error?

If necessary, use transaction SM12 to check the locks on this object.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TK864 - Object & & & could not be locked (enqueue locks) ?

  The SAP error message TK864 indicates that an object could not be locked due to enqueue locks. This typically occurs when multiple users or processes are trying to access the same object simultaneously, and one of them has already locked it for exclusive access. Here’s a breakdown of the cause, potential solutions, and related information for this error:
  Cause
  
  Concurrent Access: Another user or process has already locked the object you are trying to access. This can happen in scenarios where multiple users are trying to modify the same data or object at the same time.
  Long-Running Transactions: If a transaction takes a long time to complete, it can hold locks for an extended period, preventing others from accessing the same object.
  Deadlocks: In some cases, a deadlock situation may arise where two or more processes are waiting for each other to release locks.
  Lock Table Overflow: If the lock table is full, new locks cannot be acquired, leading to this error.
  
  Solutions
  
  Wait and Retry: Often, simply waiting for a few moments and then retrying the operation can resolve the issue, especially if the lock is held by a long-running transaction.
  Identify Lock Holders: Use transaction codes like SM12 (Display and Delete Locks) to identify which user or process is holding the lock. You can then communicate with that user to resolve the conflict.
  Release Locks: If you have the necessary permissions, you can manually delete locks in SM12. However, be cautious with this approach, as it may lead to data inconsistencies if the other process is still active.
  Optimize Transactions: Review and optimize long-running transactions to minimize the time locks are held. This can involve breaking down large transactions into smaller ones or improving performance.
  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 SAP system.
  Check for Deadlocks: Use transaction SM21 (System Log) to check for deadlocks and analyze the logs to understand the cause.
  
  Related Information
  
  Transaction Codes:
  
  SM12: Display and Delete Locks
  SM21: System Log
  SM37: Job Monitoring (to check for long-running jobs)
  
  
  SAP Notes: Check SAP Notes related to enqueue locks for specific guidance and updates.
  Performance Monitoring: Regularly monitor system performance and lock situations to proactively manage potential issues.
  
  By understanding the cause and applying the appropriate solutions, you can effectively address the TK864 error in SAP.