How To Fix /IWFND/CM_MGW_RT118 - Property '&2' of data object '&1' has no field assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW_RT -

• Message number: 118

• Message text: Property '&2' of data object '&1' has no field assigned

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_MGW_RT118 - Property '&2' of data object '&1' has no field assigned ?

  The SAP error message /IWFND/CM_MGW_RT118 indicates that there is an issue with the data model in your OData service. Specifically, it means that a property (field) of a data object is not properly assigned or mapped in the service definition. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause
  
  Missing Field Mapping: The property specified in the error message is not mapped to any field in the underlying data structure (e.g., database table or structure).
  Incorrect Data Model: The data model defined in the OData service may not match the actual structure of the data being returned.
  Changes in Data Structure: If there have been recent changes to the underlying data structure (like adding or renaming fields), the OData service may not have been updated accordingly.
  Service Definition Issues: The service definition in the SAP Gateway might be incomplete or incorrectly configured.
  
  Solution
  
  
  Check Data Model: Review the data model in the OData service to ensure that all properties are correctly defined and mapped to the corresponding fields in the underlying data structure.
  
  Use transaction code /IWFND/MAINT_SERVICE to check the service and its metadata.
  
  
  
  Update Service Definition: If there are discrepancies, update the service definition to include the missing field or correct the mapping.
  
  You may need to regenerate the service or adjust the mapping in the service builder (transaction code SEGW).
  
  
  
  Regenerate the OData Service: If changes were made to the underlying data structure, regenerate the OData service to reflect those changes.
  
  In the service builder, right-click on the project and select "Generate" to regenerate the service.
  
  
  
  Check for Annotations: Ensure that any annotations related to the properties are correctly defined in the service metadata.
  
  
  Test the Service: After making changes, test the OData service using the SAP Gateway Client (transaction /IWFND/GW_CLIENT) to ensure that the error is resolved.
  
  
  Related Information
  
  
  Transaction Codes:
  
  /IWFND/MAINT_SERVICE: Manage OData services.
  SEGW: Service Builder for OData services.
  /IWFND/GW_CLIENT: Test OData services.
  
  
  
  Documentation: Refer to SAP Help documentation for OData services and the SAP Gateway for detailed guidance on service creation and troubleshooting.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address known issues related to this error message.
  
  
  By following these steps, you should be able to identify and resolve the issue causing the /IWFND/CM_MGW_RT118 error message in your SAP OData service.