How To Fix 0S144 - You have already switched on the SQL trace

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 144

• Message text: You have already switched on the SQL trace

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 0S144 - You have already switched on the SQL trace ?

  The SAP error message 0S144 ("You have already switched on the SQL trace") typically occurs when a user attempts to activate the SQL trace (transaction code ST05) while it is already active. This can happen if the user tries to start the trace multiple times without stopping it first.
  Cause:
  
  The SQL trace is already enabled for the user session or for the system.
  The user may not have stopped the trace after the previous session, leading to the error when trying to start it again.
  
  Solution:
  
  
  Stop the SQL Trace:
  
  Go to transaction code ST05.
  Click on the "Deactivate Trace" button to stop the currently active trace.
  After stopping the trace, you can start it again without encountering the error.
  
  
  
  Check for Active Traces:
  
  If you are unsure whether the trace is active, you can check the status in the ST05 transaction.
  If you see that the trace is active, you can deactivate it from there.
  
  
  
  Use a Different User Session:
  
  If you need to run the trace without stopping the current one, consider using a different user session or a different user ID to start a new trace.
  
  
  
  Related Information:
  
  SQL Trace (ST05): This tool is used for performance analysis in SAP systems. It allows you to trace SQL statements executed by the application server.
  Performance Tuning: SQL traces are often used for performance tuning and debugging purposes. It is essential to manage traces properly to avoid confusion and ensure accurate analysis.
  User Authorizations: Ensure that you have the necessary authorizations to start and stop SQL traces in your SAP environment.
  
  If you continue to experience issues or if the error persists even after stopping the trace, it may be helpful to consult with your SAP Basis team or refer to SAP Notes for further troubleshooting steps.