How To Fix HDS038 - Appl. error in &3; source struct. for UI (&2) does not match backend (&1)

SAP Error Message - Details

• Message type: E = Error

• Message class: HDS - HDS Message Class

• Message number: 038

• Message text: Appl. error in &3; source struct. for UI (&2) does not match backend (&1)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message HDS038 - Appl. error in &3; source struct. for UI (&2) does not match backend (&1) ?

  The SAP error message HDS038 indicates a mismatch between the structure of the data being sent from the UI (User Interface) and the expected structure in the backend system. This error typically occurs in scenarios involving SAP Fiori applications or other UI technologies that interact with SAP backend systems.
  Cause:
  
  
  Data Structure Mismatch: The fields or data types in the source structure from the UI do not match those defined in the backend system. This can happen if:
  
  The UI is expecting a different version of the data structure.
  There have been changes in the backend data model that have not been reflected in the UI.
  The UI is using an outdated or incorrect service definition.
  
  
  
  Configuration Issues: Incorrect configuration in the OData service or the data model can lead to this error.
  
  
  Transport Issues: If there have been recent transports or changes in the backend system, the UI might not be aligned with the latest changes.
  
  
  Solution:
  
  
  Check Data Structure: Verify the data structure in both the UI and the backend. Ensure that the fields, data types, and structures match. You can do this by:
  
  Reviewing the OData service metadata.
  Comparing the expected structure in the backend with what the UI is sending.
  
  
  
  Update UI: If the backend structure has changed, update the UI to align with the new structure. This may involve:
  
  Modifying the UI code to match the new data model.
  Regenerating the UI artifacts if using tools like SAP Web IDE or SAP Business Application Studio.
  
  
  
  Check OData Service: Ensure that the OData service is correctly defined and activated. You can do this by:
  
  Accessing the OData service in the SAP Gateway and checking the service definition.
  Testing the service using tools like Postman or the SAP Gateway Client.
  
  
  
  Clear Cache: Sometimes, caching issues can cause discrepancies. Clear the cache in the browser or the SAP Gateway to ensure that the latest version of the service is being used.
  
  
  Transport Consistency: If there have been recent transports, ensure that all relevant changes have been transported correctly and that the UI and backend are in sync.
  
  
  Debugging: If the issue persists, consider debugging the application to trace the data flow and identify where the mismatch occurs.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide guidance on similar issues.
  Documentation: Review the documentation for the specific SAP Fiori application or OData service you are working with to understand the expected data structures.
  Community Forums: Engage with the SAP Community or 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 cause of the HDS038 error in your SAP environment.