How To Fix /IWNGW/CM_HUB075 - RFC callback performed to resolve metadata or data (system alias '&1')

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWNGW/CM_HUB -

• Message number: 075

• Message text: RFC callback performed to resolve metadata or data (system alias '&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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWNGW/CM_HUB075 - RFC callback performed to resolve metadata or data (system alias '&1') ?

  The SAP error message /IWNGW/CM_HUB075 typically indicates an issue related to the RFC (Remote Function Call) callback mechanism used in the context of SAP Gateway services. This error message suggests that there was a problem resolving metadata or data for a specific system alias.
  Cause:
  
  
  System Alias Configuration: The system alias specified in the error message (&1) may not be correctly configured in the SAP Gateway system. This could be due to missing or incorrect entries in the configuration.
  
  
  Network Issues: There may be network connectivity issues between the SAP Gateway and the backend system that the system alias points to.
  
  
  Authorization Issues: The user or service account being used to perform the RFC call may not have the necessary authorizations to access the backend system.
  
  
  Backend System Issues: The backend system may be down, or there may be issues with the services or data being requested.
  
  
  Metadata Issues: The metadata for the service may not be correctly defined or may be missing in the backend system.
  
  
  Solution:
  
  
  Check System Alias Configuration:
  
  Go to transaction SPRO and navigate to the relevant configuration for the SAP Gateway.
  Verify that the system alias is correctly defined and points to the correct backend system.
  
  
  
  Test RFC Connection:
  
  Use transaction SM59 to check the RFC destination associated with the system alias.
  Test the connection to ensure that it is working correctly.
  
  
  
  Check Authorizations:
  
  Ensure that the user or service account has the necessary authorizations to access the backend system and the required services.
  
  
  
  Check Backend System Status:
  
  Ensure that the backend system is up and running.
  Check for any issues in the backend system that may be affecting the service.
  
  
  
  Review Metadata:
  
  If the issue is related to metadata, check the service definition in the backend system to ensure that it is correctly defined and active.
  
  
  
  Check Logs:
  
  Review the SAP Gateway logs (transaction /IWFND/ERROR_LOG) and the backend system logs for any additional error messages that may provide more context.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  Documentation: Review the SAP Gateway documentation for information on configuring system aliases and troubleshooting RFC issues.
  Community Forums: Consider checking SAP Community forums or other online resources for similar issues and solutions shared by other users.
  
  If the problem persists after following these steps, it may be beneficial to engage SAP support for further assistance.