How To Fix 0S164 - You have already activated the HTTP trace

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 164

• Message text: You have already activated the HTTP trace

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 0S164 - You have already activated the HTTP trace ?

  The SAP error message 0S164 indicates that the HTTP trace has already been activated for the current session or user. This message typically arises when you attempt to activate the HTTP trace while it is already enabled, which can lead to confusion or issues in debugging HTTP requests.
  Cause:
  The primary cause of this error is that the HTTP trace functionality in SAP has already been turned on for the user or session. This can happen if:
  
  The trace was activated previously and not deactivated.
  Multiple attempts to activate the trace are made without first deactivating it.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Deactivate the HTTP Trace:
  
  Go to the transaction code SICF (HTTP Service Hierarchy).
  Navigate to the service for which you want to deactivate the trace.
  Look for the option to deactivate the HTTP trace. This is usually found in the "Trace" or "Logging" section.
  Alternatively, you can use the transaction code ST01 to deactivate the trace.
  
  
  
  Check Current Trace Status:
  
  You can check if the trace is currently active by using the transaction code ST01 (System Trace).
  If the trace is active, you can deactivate it from there.
  
  
  
  Re-attempt Activation:
  
  After ensuring that the trace is deactivated, you can try to activate it again.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SICF: Used for managing HTTP services in SAP.
  ST01: Used for system tracing, including HTTP traces.
  
  
  
  HTTP Trace Usage:
  
  The HTTP trace is useful for debugging issues related to HTTP requests and responses in SAP applications. It captures detailed information about the HTTP communication, which can help in diagnosing problems.
  
  
  
  Performance Considerations:
  
  Keep in mind that enabling HTTP traces can impact system performance. It is advisable to use it only when necessary and to deactivate it once you have completed your debugging.
  
  
  
  If you continue to experience issues or if the error persists after following these steps, consider consulting your SAP Basis team or referring to SAP Notes for further troubleshooting.