How To Fix /IWNGW/CM_HUB077 - OData 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: 077

• Message text: OData 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_HUB077 - OData callback performed to resolve metadata or data (system alias '&1') ?

  The SAP error message /IWNGW/CM_HUB077 typically indicates an issue related to OData services, specifically when the system is trying to resolve metadata or data for a given system alias. This error can occur in various scenarios, such as when accessing OData services in SAP Gateway or when there are issues with the configuration of the OData service.
  Cause:
  
  System Alias Configuration: The system alias specified in the error message may not be correctly configured or may not point to a valid backend system.
  Network Issues: There could be network connectivity issues between the SAP Gateway and the backend system.
  Service Activation: The OData service may not be activated in the backend system.
  Authorization Issues: The user may not have the necessary authorizations to access the OData service.
  Metadata Issues: There may be issues with the metadata of the OData service, such as missing or incorrect definitions.
  
  Solution:
  
  
  Check System Alias:
  
  Go to transaction SM59 and verify the configuration of the RFC destination corresponding to the system alias mentioned in the error message.
  Ensure that the connection is working properly by testing the connection.
  
  
  
  Activate OData Service:
  
  Use transaction /IWFND/MAINT_SERVICE to check if the OData service is activated in the backend system.
  If it is not activated, activate it and ensure that the service is properly registered.
  
  
  
  Check Authorizations:
  
  Ensure that the user has the necessary authorizations to access the OData service. This may involve checking roles and authorizations in transaction PFCG.
  
  
  
  Review Network Connectivity:
  
  Check for any network issues that may be preventing the SAP Gateway from reaching the backend system. This may involve checking firewalls, network routes, etc.
  
  
  
  Check Metadata:
  
  If there are issues with the metadata, you may need to regenerate the metadata for the OData service. This can be done by using transaction /IWFND/MAINT_SERVICE and selecting the service to regenerate its metadata.
  
  
  
  Check Logs:
  
  Review the logs in transaction SLG1 for any additional error messages or details that may provide more context about the issue.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  OData Documentation: Familiarize yourself with OData service development and troubleshooting in SAP Gateway, as this can provide insights into common issues and their resolutions.
  Community Forums: Consider searching or posting in SAP Community forums for additional 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_HUB077 error message.