How To Fix /UI2/CORE_FES004 - Error in Gateway hub &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI2/CORE_FES -

• Message number: 004

• Message text: Error in Gateway hub &1

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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Smart SAP Assistant

• What is the cause and solution for SAP error message /UI2/CORE_FES004 - Error in Gateway hub &1 ?

  The SAP error message /UI2/CORE_FES004 Error in Gateway hub &1 typically indicates an issue related to the SAP Gateway, particularly in the context of SAP Fiori applications. This error can arise due to various reasons, including configuration issues, connectivity problems, or issues with the underlying OData services.
  Causes:
  
  Gateway Configuration Issues: The SAP Gateway might not be properly configured, leading to communication problems between the front-end and back-end systems.
  Service Activation: The OData service required by the Fiori application may not be activated in the SAP Gateway system.
  Authorization Issues: The user may not have the necessary authorizations to access the OData service or the Fiori application.
  Network Issues: There could be network connectivity problems between the front-end and back-end systems.
  Backend System Errors: The backend system might be experiencing issues that prevent it from processing requests from the Gateway.
  
  Solutions:
  
  
  Check Gateway Configuration:
  
  Ensure that the SAP Gateway is correctly configured and that the necessary settings are in place.
  Use transaction code /IWFND/MAINT_SERVICE to check if the required OData service is activated.
  
  
  
  Activate OData Services:
  
  If the OData service is not activated, activate it using the same transaction code mentioned above.
  Ensure that the service is correctly registered and that the relevant system alias is set up.
  
  
  
  Check Authorizations:
  
  Verify that the user has the necessary authorizations to access the Fiori application and the underlying OData service.
  Use transaction code SU53 to check for authorization failures after attempting to access the application.
  
  
  
  Network Connectivity:
  
  Check the network connectivity between the front-end and back-end systems. Ensure that there are no firewall or proxy issues blocking the communication.
  
  
  
  Review Backend Logs:
  
  Check the backend system logs for any errors that might indicate issues with processing requests from the Gateway.
  Use transaction codes like SLG1 to view application logs for more detailed error messages.
  
  
  
  Check System Status:
  
  Ensure that both the front-end and back-end systems are up and running without any critical issues.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address specific issues related to the error message.
  Fiori Launchpad Configuration: Ensure that the Fiori Launchpad is correctly configured and that the necessary roles and catalogs are assigned to the user.
  OData Service Documentation: Review the documentation for the specific OData service being used to ensure that it is being called correctly.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.