How To Fix 0S118 - Error switching on Trace BUF

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 118

• Message text: Error switching on Trace BUF

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message 0S118 - Error switching on Trace BUF ?

  The SAP error message 0S118 ("Error switching on Trace BUF") typically indicates an issue with enabling the trace buffer for debugging or performance analysis in the SAP system. This error can occur for various reasons, including configuration issues, insufficient authorizations, or problems with the underlying system resources.
  Causes:
  
  Insufficient Authorizations: The user may not have the necessary permissions to enable tracing.
  Configuration Issues: The trace buffer may not be properly configured in the system settings.
  System Resource Limitations: The system may be running low on memory or other resources, preventing the trace buffer from being activated.
  Trace Buffer Limitations: The trace buffer may have reached its maximum size or may be disabled in the system configuration.
  
  Solutions:
  
  Check Authorizations: Ensure that the user has the necessary authorizations to enable tracing. This may involve checking roles and permissions in the user profile.
  Review Configuration: Verify the configuration settings for the trace buffer in the SAP system. This can typically be done in transaction RZ10 (for profile parameters) or RZ20 (for monitoring).
  Monitor System Resources: Check the system's memory and resource usage. If the system is low on resources, consider optimizing performance or increasing available resources.
  Adjust Trace Buffer Settings: If the trace buffer is full or disabled, you may need to adjust the settings. This can involve increasing the size of the trace buffer or enabling it if it is currently disabled.
  Restart the System: In some cases, a system restart may resolve temporary issues related to the trace buffer.
  
  Related Information:
  
  Transaction Codes: 
  
  RZ10: To manage profile parameters.
  RZ20: To monitor system performance and trace settings.
  ST01: To analyze authorization checks and trace issues.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  System Logs: Review system logs (transaction SM21) for any related error messages or warnings that could provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.