How To Fix SDS_COMMON028 - HTTP client: open method failed with return code SY_SUBRC &1

SAP Error Message - Details

• Message type: E = Error

• Message class: SDS_COMMON -

• Message number: 028

• Message text: HTTP client: open method failed with return code SY_SUBRC &1

What causes this issue?

While the HTTP connection was established, an error occurred.

System Response

The connection was closed, the processing was cancelled.

How to fix this error?

Check the documentation for information about errors during HTTP
communication.

Procedure for System Administrators

Method CREATE_BY_URL of class CL_HTTP_CLIENT returned the error code
&V1&
The error codes can be mapped to the following exceptions of the method:
1 = ARGUMENT_NOT_FOUND
2 = PLUGIN_NOT_ACTIVE
3 = INTERNAL_ERROR

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDS_COMMON028 - HTTP client: open method failed with return code SY_SUBRC &1 ?

  The SAP error message SDS_COMMON028 with the description "HTTP client: open method failed with return code SY_SUBRC &1" typically indicates that there was an issue when trying to open an HTTP connection in an SAP system. The return code SY_SUBRC provides additional information about the nature of the failure.
  Possible Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target HTTP server.
  Incorrect URL: The URL being accessed may be incorrect or malformed.
  Authentication Issues: If the HTTP request requires authentication, and the credentials are incorrect or missing, this can lead to failure.
  Firewall or Proxy Settings: Firewalls or proxy settings may be blocking the HTTP request.
  SSL/TLS Issues: If the connection is over HTTPS, there may be issues with SSL certificates or TLS settings.
  SAP Configuration: The HTTP client configuration in SAP may not be set up correctly.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the SAP system can reach the target HTTP server. You can use tools like ping or telnet to test connectivity.
  Verify the URL: Double-check the URL being used in the HTTP request to ensure it is correct.
  Review Authentication: If the HTTP request requires authentication, ensure that the correct credentials are being used and that they are properly configured in SAP.
  Firewall/Proxy Configuration: Check if there are any firewall rules or proxy settings that might be blocking the request. You may need to work with your network team to resolve this.
  SSL/TLS Configuration: If using HTTPS, ensure that the SSL certificates are valid and properly configured in the SAP system. You may need to import the server's SSL certificate into the SAP trust store.
  SAP HTTP Client Configuration: Review the configuration of the HTTP client in SAP. This can include settings in transaction SOAMANAGER or other relevant configuration transactions.
  
  Related Information:
  
  Transaction Codes: You may want to check the configuration in SOAMANAGER for web service configurations or SICF for HTTP services.
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Logs and Traces: Check the application logs (transaction SLG1) and HTTP traces (transaction SMICM) for more detailed error messages that can provide further insights into the issue.
  
  If the problem persists after checking these areas, consider reaching out to SAP support for further assistance, providing them with the specific return code and any relevant logs or traces.