How To Fix SCLNT_HTTP401 - Connection to server broken (ICM_HTTP_CONNECTION_BROKEN)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 401

• Message text: Connection to server broken (ICM_HTTP_CONNECTION_BROKEN)

What causes this issue?

The server has closed the connection unexpectedly.

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?

The server has closed the connection unexpectedly. One possible reason
is that HTTP was sent to an HTTPS port (or another port that is intended
for a completely different protocol). In this case, ensure that you
address the correct port with the correct protocol. Otherwise the reason
for the terminated connection will have to be found on the server side.
Check whether the server has logged error messages on closing the
connection.

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_HTTP401 - Connection to server broken (ICM_HTTP_CONNECTION_BROKEN) ?

  The SAP error message SCLNT_HTTP401 Connection to server broken (ICM_HTTP_CONNECTION_BROKEN) typically indicates that there is an issue with the HTTP connection between the SAP system and the client or server it is trying to communicate with. This error can occur due to various reasons, including network issues, server configuration problems, or authentication failures.
  Causes:
  
  Authentication Issues: The client may not be properly authenticated, leading to a 401 Unauthorized error.
  Network Problems: There may be network connectivity issues between the SAP system and the target server.
  Server Configuration: The target server may not be configured to accept connections from the SAP system.
  Timeouts: The connection may have timed out due to inactivity or long processing times.
  Firewall or Proxy Issues: Firewalls or proxies may be blocking the connection.
  Incorrect URL: The URL being accessed may be incorrect or the server may not be reachable.
  
  Solutions:
  
  Check Authentication: Ensure that the credentials used for authentication are correct and that the user has the necessary permissions.
  Network Connectivity: Verify that there are no network issues. You can use tools like ping or traceroute to check connectivity to the target server.
  Server Configuration: Check the configuration of the target server to ensure it is set up to accept connections from the SAP system.
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the SAP system or the target server.
  Firewall/Proxy Settings: Review firewall and proxy settings to ensure that they are not blocking the connection.
  Verify URL: Double-check the URL being accessed to ensure it is correct and that the server is reachable.
  
  Related Information:
  
  ICM (Internet Communication Manager): The ICM is responsible for handling HTTP(S) requests in SAP systems. Understanding its configuration can help in troubleshooting connection issues.
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message. SAP frequently updates its knowledge base with solutions to common problems.
  Logs: Review the ICM logs and the application logs for more detailed error messages that can provide additional context for the issue.
  SAP Community: Engaging with the SAP Community can provide insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to involve your SAP Basis team or consult SAP support for further assistance.