How To Fix 0S142 - The Enqueue trace is already switched on for user &

SAP Error Message - Details

• Message type: E = Error

• Message class: 0S - Messages for the SQL trace

• Message number: 142

• Message text: The Enqueue trace is already switched on for user &

What causes this issue?

The trace can only be activated for one user or group of users on each
application server. The enqueue trace has already been activated for the
specified user.

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?

Wait until the other user deactivates the trace. You can then activate
the trace. You can also activate the trace for all users, or for users
whose names match a pattern. When doing so, specify the pattern in the
usual format.
You can activate the trace for multiple users by choosing the "Activate
Trace with Filter" button.

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 0S142 - The Enqueue trace is already switched on for user & ?

  The SAP error message 0S142 indicates that the enqueue trace is already activated for the specified user. This message typically arises when there is an attempt to activate the enqueue trace for a user who already has it enabled.
  Cause:
  The enqueue trace is a diagnostic tool used in SAP to monitor and analyze enqueue operations (locking mechanisms) in the system. When a user tries to activate the enqueue trace while it is already active, the system generates this error message.
  Solution:
  To resolve this issue, you can take the following steps:
  
  
  Check Current Trace Status:
  
  Use transaction code SM12 to check the current locks and see if the enqueue trace is already active for the user in question.
  
  
  
  Deactivate the Enqueue Trace:
  
  If you need to deactivate the trace for any reason, you can do so using transaction code ST01 (System Trace) or ST02 (Tune Summary) depending on your system version. 
  In the trace settings, you can deactivate the enqueue trace for the user.
  
  
  
  Re-activate the Trace:
  
  If you need to re-activate the trace after deactivating it, you can do so using the same transaction codes mentioned above.
  
  
  
  Check User Permissions:
  
  Ensure that the user has the necessary permissions to activate or deactivate the enqueue trace. Sometimes, permission issues can lead to confusion regarding the trace status.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for more detailed instructions on managing enqueue traces.
  
  
  
  Related Information:
  
  Enqueue Trace: This is a tool used for debugging and monitoring the locking mechanism in SAP. It helps in identifying issues related to data consistency and concurrency.
  Transaction Codes:
  
  SM12: To view and manage locks.
  ST01: To activate/deactivate system traces.
  ST02: To monitor memory and performance issues.
  
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or solutions related to this error message.
  
  If the problem persists after following these steps, consider reaching out to your SAP Basis team or SAP support for further assistance.