How To Fix SCLNT_HTTP413 - Unknown proxy host name (ICM_HTTP_PROXY_HOST_UNKNOWN)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 413

• Message text: Unknown proxy host name (ICM_HTTP_PROXY_HOST_UNKNOWN)

What causes this issue?

The host name of the proxy server is unknown.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Make sure that the specified proxy server is visible and reachable.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SCLNT_HTTP413 - Unknown proxy host name (ICM_HTTP_PROXY_HOST_UNKNOWN) ?

  The SAP error message SCLNT_HTTP413 with the description "Unknown proxy host name (ICM_HTTP_PROXY_HOST_UNKNOWN)" typically indicates that the SAP system is unable to resolve the hostname of the proxy server specified in the configuration. This can occur due to various reasons, such as incorrect proxy settings, network issues, or DNS resolution problems.
  Causes:
  
  Incorrect Proxy Configuration: The proxy settings in the SAP system may be incorrectly configured, leading to an unresolvable hostname.
  DNS Issues: The hostname of the proxy server may not be resolvable due to DNS configuration issues.
  Network Connectivity: There may be network connectivity issues preventing the SAP system from reaching the proxy server.
  Firewall Restrictions: Firewalls or security settings may be blocking access to the proxy server.
  Proxy Server Down: The proxy server itself may be down or not reachable.
  
  Solutions:
  
  
  Check Proxy Configuration:
  
  Go to the SAP system and check the proxy settings in transaction SICF (Internet Communication Framework) or RZ10 (Profile Parameters).
  Ensure that the proxy hostname and port are correctly specified.
  
  
  
  Test DNS Resolution:
  
  Use command-line tools (like nslookup or ping) from the server where SAP is running to check if the proxy hostname can be resolved.
  If it cannot be resolved, check the DNS settings or consider using an IP address instead of a hostname.
  
  
  
  Verify Network Connectivity:
  
  Ensure that the SAP system can reach the proxy server over the network. You can use tools like telnet to test connectivity to the proxy server's port.
  
  
  
  Check Firewall Settings:
  
  Ensure that there are no firewall rules blocking traffic to the proxy server. Consult with your network/security team if necessary.
  
  
  
  Check Proxy Server Status:
  
  Verify that the proxy server is up and running. If it is down, you may need to contact the administrator of the proxy server.
  
  
  
  Review SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  ICM (Internet Communication Manager): This is the component in SAP that handles HTTP(S) communication. Understanding its configuration can help in troubleshooting.
  Transaction Codes: Familiarize yourself with relevant transaction codes like SICF, RZ10, and RZ11 for configuration and parameter checks.
  Logs: Check the ICM logs (transaction SMICM) for more detailed error messages that may provide additional context for the issue.
  
  By following these steps, you should be able to identify and resolve the cause of the SCLNT_HTTP413 error in your SAP system.