How To Fix SCLNT_HTTP426 - Unexpected HTTP status code from HTTP proxy (ICM_HTTP_PROXY_HTTP_ERROR)

SAP Error Message - Details

• Message type: E = Error

• Message class: SCLNT_HTTP - Messages for HTTP Client for Respective Error Code

• Message number: 426

• Message text: Unexpected HTTP status code from HTTP proxy (ICM_HTTP_PROXY_HTTP_ERROR)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SCLNT_HTTP426 - Unexpected HTTP status code from HTTP proxy (ICM_HTTP_PROXY_HTTP_ERROR) ?

  The SAP error message SCLNT_HTTP426 indicates that there is an unexpected HTTP status code being returned from an HTTP proxy, specifically an HTTP proxy error. The error code ICM_HTTP_PROXY_HTTP_ERROR suggests that the Internet Communication Manager (ICM) in SAP is encountering issues when trying to communicate through the configured HTTP proxy.
  Causes:
  
  Proxy Configuration Issues: The HTTP proxy settings in the SAP system may be incorrect or misconfigured.
  Network Issues: There may be network connectivity problems between the SAP system and the HTTP proxy server.
  Proxy Server Issues: The proxy server itself may be down, misconfigured, or returning an unexpected response.
  Authentication Issues: If the proxy requires authentication, and the credentials are not provided or are incorrect, this can lead to errors.
  Firewall or Security Settings: Firewalls or security settings may be blocking the connection to the proxy server.
  HTTP Status Code: The proxy may be returning a specific HTTP status code (like 403 Forbidden, 404 Not Found, etc.) that indicates a problem with the request.
  
  Solutions:
  
  
  Check Proxy Configuration:
  
  Verify the HTTP proxy settings in the SAP system (transaction code RZ10 for profile parameters or RZ12 for ICM settings).
  Ensure that the proxy address and port are correctly configured.
  
  
  
  Test Network Connectivity:
  
  Use tools like ping or telnet to check connectivity to the proxy server from the SAP application server.
  Ensure that there are no network issues preventing access to the proxy.
  
  
  
  Check Proxy Server Status:
  
  Ensure that the proxy server is up and running and is configured to accept requests from the SAP system.
  Check the logs on the proxy server for any errors or issues.
  
  
  
  Review Authentication Settings:
  
  If the proxy requires authentication, ensure that the correct credentials are being used.
  Check if the credentials need to be updated or if there are any changes in the authentication method.
  
  
  
  Firewall and Security Settings:
  
  Review firewall rules to ensure that traffic to and from the proxy server is allowed.
  Check for any security policies that might be blocking the connection.
  
  
  
  Analyze HTTP Status Codes:
  
  If possible, capture the HTTP response from the proxy to understand the specific status code being returned.
  Based on the status code, take appropriate action (e.g., if it's a 403 error, check permissions; if it's a 404 error, check the URL being requested).
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to HTTP proxy issues for any known bugs or patches.
  ICM Logs: Review the ICM logs (transaction SMICM) for more detailed error messages that can provide additional context.
  Network Traces: If necessary, perform network traces to analyze the traffic between the SAP system and the proxy server.
  
  By following these steps, you should be able to identify and resolve the cause of the SCLNT_HTTP426 error in your SAP system.