How To Fix 0S120 - Error switching off Trace TST21

0S120 - Overview

• Message type: E = Error

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

• Message number: 120

• Message text: Error switching off Trace TST21

What causes this issue?

Filter settings for the performance trace are collected in table TST21.
An error occurred when the system attempted to initialize these
settings.

System Response

Processing continues after the error message.

How to fix this error?

Attempt to switch on the performance trace and activate the filter by
choosing "Trace on with filter". If the error occurs again, restart the
system. This should eliminate the error.

Error message extract from SAP system. Copyright SAP SE.

0S120 - Details

• The SAP error message 0S120 indicates an issue related to the trace functionality in the SAP system, specifically when trying to switch off the trace for a particular transaction or user session. The trace functionality is often used for debugging and performance analysis, and the error can occur for various reasons.
  Cause
  The error can be caused by several factors, including:
  
  Insufficient Authorizations: The user may not have the necessary authorizations to switch off the trace.
  System 
  Configuration Issues: There may be configuration issues in the SAP system that prevent the trace from being turned off.
  Technical Issues: There could be underlying technical problems, such as database locks or issues with the tracing mechanism itself.
  Session Issues: The session in which the trace is being turned off may have expired or encountered an error.
  
  Solution
  To resolve the error, you can try the following steps:
  
  
  Check Authorizations: Ensure that the user has the necessary authorizations to manage traces. You