How To Fix 0S147 - You have already activated the table buffer trace

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 147

• Message text: You have already activated the table buffer trace

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 0S147 - You have already activated the table buffer trace ?

  The SAP error message 0S147 ("You have already activated the table buffer trace") typically occurs when there is an attempt to activate the table buffer trace for a table that is already being traced. This can happen in the context of performance analysis or debugging when you are trying to monitor the buffer behavior of a specific database table.
  Cause:
  The error is caused by the following scenarios:
  
  Duplicate Activation: The table buffer trace for the specified table is already activated, and a second attempt to activate it is made.
  Session Confusion: If multiple sessions are open, one session may have already activated the trace, leading to confusion in another session trying to activate it again.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Current Traces: Before activating the table buffer trace, check if it is already active. You can do this by using transaction ST05 (SQL Trace) or ST12 (Combined Trace) to see if the trace for the specific table is already running.
  
  
  Deactivate Existing Trace: If you find that the trace is already active and you want to restart it, you can deactivate it first. This can typically be done in the same transaction where you activated it, or you can use the appropriate function to deactivate the trace.
  
  
  Use Different Sessions: If you are working in multiple sessions, ensure that you are not trying to activate the trace in more than one session for the same table.
  
  
  Wait for Completion: If the trace is running for a long time, you may need to wait for it to complete before trying to activate it again.
  
  
  Consult Documentation: If you are unsure about the steps or need more detailed instructions, refer to the SAP documentation or help resources related to performance tracing and debugging.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like ST05 (SQL Trace), ST12 (Combined Trace), and SE11 (Data Dictionary) for managing and analyzing database tables and traces.
  SAP Notes: Check SAP Notes for any specific updates or patches related to this error message, as there may be known issues or fixes provided by SAP.
  Performance Monitoring: Understanding how to effectively monitor and analyze performance in SAP can help prevent similar issues in the future.
  
  By following these steps, you should be able to resolve the error and successfully manage the table buffer trace in your SAP environment.