How To Fix /IWNGW/CM_HUB048 - Unknown error while creating an HTTP client

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWNGW/CM_HUB -

• Message number: 048

• Message text: Unknown error while creating an HTTP client

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWNGW/CM_HUB048 - Unknown error while creating an HTTP client ?

  The SAP error message /IWNGW/CM_HUB048 Unknown error while creating an HTTP client typically indicates an issue with the HTTP client configuration or connectivity in the SAP system. This error can occur in various scenarios, such as when trying to connect to an external service or when using the SAP Gateway.
  Possible Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the external service.
  Configuration Errors: Incorrect configuration settings in the HTTP client or the destination settings in the SAP system.
  Authorization Issues: The user or service account may not have the necessary permissions to create an HTTP client or access the external service.
  Service Unavailability: The external service you are trying to connect to may be down or not reachable.
  SAP Gateway Issues: Problems with the SAP Gateway itself, such as missing components or misconfigurations.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Ensure that the SAP system can reach the external service. You can use tools like ping or telnet to test connectivity.
  Check firewall settings to ensure that they are not blocking the connection.
  
  
  
  Review HTTP Client Configuration:
  
  Go to transaction SM59 and check the configuration of the HTTP destination. Ensure that the settings (like the URL, authentication method, etc.) are correct.
  Test the connection from SM59 to see if it is successful.
  
  
  
  Check Authorization:
  
  Verify that the user or service account has the necessary authorizations to create an HTTP client and access the external service.
  Check roles and profiles assigned to the user.
  
  
  
  Examine Logs:
  
  Check the SAP application logs (transaction SLG1) for more detailed error messages that might provide additional context.
  Look at the HTTP trace (transaction SICF) to see if there are any errors logged during the HTTP request.
  
  
  
  Service Availability:
  
  Ensure that the external service is up and running. You can try accessing the service from a web browser or using a tool like Postman.
  
  
  
  SAP Gateway Configuration:
  
  If the issue persists, check the configuration of the SAP Gateway. Ensure that all necessary components are installed and configured correctly.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that might address this specific error message or provide patches or updates.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for more details on configuring HTTP clients and troubleshooting connectivity issues.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  SAP Support: If the issue cannot be resolved, consider reaching out to SAP Support for assistance.
  
  By following these steps, you should be able to identify and resolve the cause of the /IWNGW/CM_HUB048 error in your SAP system.