How To Fix /IWNGW/CM_HUB121 - Call back not performed as system alias is invalid

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWNGW/CM_HUB -

• Message number: 121

• Message text: Call back not performed as system alias is invalid

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWNGW/CM_HUB121 - Call back not performed as system alias is invalid ?

  The SAP error message /IWNGW/CM_HUB121 Call back not performed as system alias is invalid typically occurs in the context of SAP Gateway services, particularly when there is an issue with the configuration of the system alias used for communication between the SAP Gateway and the backend system.
  Cause:
  
  Invalid System Alias: The system alias configured in the SAP Gateway is either incorrect or does not exist in the backend system.
  Missing Configuration: The system alias may not be properly set up in the SAP Gateway configuration.
  Authorization Issues: The user or service account being used may not have the necessary authorizations to access the backend system.
  Network Issues: There may be network connectivity issues preventing the SAP Gateway from reaching the backend system.
  
  Solution:
  
  
  Check System Alias Configuration:
  
  Go to the SAP Gateway system and check the configuration of the system alias.
  Use transaction code /IWFND/MAINT_SERVICE to view the services and their associated system aliases.
  Ensure that the system alias is correctly defined and points to a valid backend system.
  
  
  
  Verify Backend System:
  
  Ensure that the backend system is up and running.
  Check if the backend system is correctly registered in the SAP Gateway.
  
  
  
  Check Authorizations:
  
  Verify that the user or service account has the necessary authorizations to access the backend system.
  You can use transaction code SU53 to check for authorization issues after the error occurs.
  
  
  
  Network Connectivity:
  
  Ensure that there are no network issues preventing communication between the SAP Gateway and the backend system.
  You can use tools like ping or telnet to check connectivity.
  
  
  
  Reconfigure the System Alias:
  
  If the system alias is incorrect, you may need to delete and recreate it.
  Use transaction code SM59 to manage RFC connections and ensure that the connection to the backend system is correctly configured.
  
  
  
  Check Logs:
  
  Review the SAP Gateway logs for any additional error messages that may provide more context about the issue.
  Use transaction code SLG1 to view application logs related to the Gateway.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Refer to the official SAP documentation for SAP Gateway and OData services for more detailed configuration guidelines.
  Community Forums: Consider searching or posting in SAP community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the issue related to the /IWNGW/CM_HUB121 error message.