How To Fix 0S057 - You have not selected a trace to switch on

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 057

• Message text: You have not selected a trace to switch on

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 0S057 - You have not selected a trace to switch on ?

  The SAP error message 0S057 ("You have not selected a trace to switch on") typically occurs when you are trying to activate a trace in the SAP system, but you have not specified which trace you want to activate. This can happen in various contexts, such as when using transaction codes for performance analysis or debugging.
  Cause:
  The error is caused by the absence of a selected trace option in the trace activation screen. This means that the system requires you to specify which trace you want to enable, but you have not made a selection.
  Solution:
  To resolve this error, follow these steps:
  
  
  Access the Trace Activation Screen: Go to the transaction where you are trying to activate the trace (e.g., ST01 for System Trace, ST05 for SQL Trace, etc.).
  
  
  Select the Trace Type: Ensure that you select at least one trace type that you want to activate. For example, if you are in ST01, you might need to check options like "Kernel," "RFC," "SQL," etc.
  
  
  Activate the Trace: After selecting the desired trace options, proceed to activate the trace. This usually involves clicking a button like "Activate" or "Start Trace."
  
  
  Check for Additional Settings: Depending on the trace type, there may be additional settings or filters you can configure. Make sure to review these options if necessary.
  
  
  Save and Execute: Once you have made your selections, save the settings and execute the trace.
  
  
  Related Information:
  
  
  Transaction Codes: Common transaction codes related to tracing include:
  
  ST01: System Trace
  ST05: SQL Trace
  ST12: Combined Trace
  SM50: Process Overview (to monitor running processes)
  
  
  
  Trace Analysis: After activating the trace, you can analyze the collected data to identify performance bottlenecks or issues in the system.
  
  
  User Authorizations: Ensure that you have the necessary authorizations to activate traces. Lack of permissions can also lead to issues when trying to enable tracing.
  
  
  Documentation: Refer to SAP Help documentation for detailed information on how to use tracing tools effectively.
  
  
  By following these steps, you should be able to resolve the error and successfully activate the desired trace in your SAP system.