How To Fix /IWNGW/CM_HUB007 - Read reference via navigation '&1' not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWNGW/CM_HUB -

• Message number: 007

• Message text: Read reference via navigation '&1' not supported

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 /IWNGW/CM_HUB007 - Read reference via navigation '&1' not supported ?

  The SAP error message /IWNGW/CM_HUB007 Read reference via navigation '&1' not supported typically occurs in the context of SAP Gateway services, particularly when trying to access a navigation property that is not supported or not properly defined in the OData service.
  Cause:
  
  Unsupported Navigation: The error indicates that the navigation path you are trying to access is not supported by the OData service. This could be due to the navigation property not being defined in the service or the underlying data model.
  Service Configuration: The OData service may not be configured correctly to handle the requested navigation.
  Model Definition: The data model may not include the necessary associations or relationships that allow for the navigation to occur.
  Versioning Issues: If there are multiple versions of the service, you might be accessing an outdated version that does not support the requested navigation.
  
  Solution:
  
  Check OData Service Definition: Review the OData service definition in the SAP Gateway Service Builder (transaction code SEGW). Ensure that the navigation properties are correctly defined and that the associations between entities are properly set up.
  Update Service: If the navigation property is missing, you may need to add it to the service definition and regenerate the service.
  Test with Different Navigation: If you are trying to access a specific navigation path, test with other paths to see if the issue is isolated to that particular navigation.
  Check Service Activation: Ensure that the OData service is activated in the SAP Gateway (transaction code /IWFND/MAINT_SERVICE).
  Debugging: Use transaction code /IWFND/ERROR_LOG to check for any additional error messages or logs that might provide more context on the issue.
  Consult Documentation: Review the SAP documentation for the specific version of the OData service you are using to ensure that you are following the correct guidelines for navigation.
  
  Related Information:
  
  SAP Gateway: The SAP Gateway is a technology that allows you to connect devices, environments, and applications to SAP systems. Understanding how it works can help in troubleshooting issues related to OData services.
  OData Protocol: Familiarize yourself with the OData protocol, as it defines how to access and manipulate data using RESTful APIs. Understanding its principles can help in diagnosing issues related to navigation and data access.
  SAP Community: Engage with the SAP Community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, consider reaching out to your SAP support team for further assistance.