How To Fix /SCWM/L3142 - Error locking tRFC &1 by user &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/L3 -

• Message number: 142

• Message text: Error locking tRFC &1 by user &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/L3142 - Error locking tRFC &1 by user &2 ?

  The SAP error message /SCWM/L3142 Error locking tRFC &1 by user &2 typically occurs in the context of the SAP Extended Warehouse Management (EWM) system when there is an issue with the transactional Remote Function Call (tRFC) locking mechanism. This error indicates that a specific tRFC queue is locked by another user, preventing the current user from processing it.
  Cause:
  
  Concurrent Access: The tRFC queue is being accessed by another user or process, leading to a lock on that queue.
  Long-Running Transactions: If a transaction takes too long to complete, it may hold the lock longer than expected, causing other transactions to fail.
  System Configuration: There may be configuration issues in the tRFC settings or in the EWM system that lead to locking problems.
  User Session Issues: Sometimes, user sessions may not be properly terminated, leading to lingering locks.
  
  Solution:
  
  Identify the Lock: Use transaction code SM12 to check for locks held by user &2. You can identify the specific tRFC queue that is locked.
  Release the Lock: If you have the necessary authorizations, you can manually release the lock from SM12. Be cautious when doing this, as it may affect other users or processes.
  Check for Long-Running Processes: Investigate if there are any long-running processes that are holding the lock. You can use transaction SM66 to monitor active processes in the system.
  Review tRFC Settings: Check the configuration of the tRFC settings in your SAP system to ensure they are set up correctly.
  User Coordination: If multiple users are working on the same tRFC queue, coordinate with them to avoid conflicts.
  System Restart: In some cases, a system restart may be necessary to clear any lingering locks, but this should be done with caution and typically as a last resort.
  
  Related Information:
  
  tRFC: Transactional Remote Function Call is a communication method in SAP that ensures that the called function is executed exactly once, even in the case of system failures.
  Lock Management: SAP uses a locking mechanism to prevent data inconsistencies when multiple users or processes try to access the same data simultaneously.
  Monitoring Tools: Use tools like SM21 (System Log) and SLG1 (Application Log) to check for any related error messages or logs that might provide more context on the issue.
  
  If the problem persists after trying the above solutions, it may be necessary to consult with your SAP Basis team or SAP support for further assistance.