How To Fix /IWNGW/CM_HUB074 - Callback not performed as metadata and data are available on hub

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWNGW/CM_HUB -

• Message number: 074

• Message text: Callback not performed as metadata and data are available on hub

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWNGW/CM_HUB074 - Callback not performed as metadata and data are available on hub ?

  The SAP error message /IWNGW/CM_HUB074 Callback not performed as metadata and data are available on hub typically occurs in the context of SAP Gateway and OData services, particularly when dealing with a hub deployment scenario. This error indicates that the system is trying to perform a callback operation, but it has determined that both the metadata and the data are already available on the hub system, so the callback is not necessary.
  Cause:
  
  Data Availability: The error suggests that the requested data and its metadata are already present in the hub system, which means that the system does not need to fetch or process the data again.
  Configuration Issues: There might be a misconfiguration in the way the OData service is set up, leading to the system not recognizing that it should perform the callback.
  Caching: The hub system may have cached the data and metadata, which can lead to this message if the system is trying to fetch the same data again.
  
  Solution:
  
  Check Data Availability: Ensure that the data and metadata are indeed available on the hub. You can do this by checking the relevant OData service in the SAP Gateway Client (transaction /IWFND/GW_CLIENT).
  Review Service Configuration: Verify the configuration of the OData service in the SAP Gateway. Ensure that the service is correctly set up to handle callbacks and that the necessary settings are in place.
  Clear Cache: If caching is causing the issue, consider clearing the cache for the OData service. You can do this by using transaction /IWFND/CACHE to clear the cache for the specific service.
  Debugging: If the issue persists, you may need to debug the OData service to understand why the callback is not being performed. Check the implementation of the service and any associated logic that handles callbacks.
  Check for Updates: Ensure that your SAP system is up to date with the latest support packages and notes, as there may be fixes or improvements related to this issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to the specific OData service or the error message for any known issues or patches.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Documentation: Review the official SAP documentation for OData services and SAP Gateway to ensure that you are following best practices in your implementation.
  
  If the problem continues after trying these solutions, it may be beneficial to reach out to SAP support for further assistance.