How To Fix /IWFND/CM_MGW_RT122 - Navigation property '&1' of data object '&2' is inconsistent

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW_RT -

• Message number: 122

• Message text: Navigation property '&1' of data object '&2' is inconsistent

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_MGW_RT122 - Navigation property '&1' of data object '&2' is inconsistent ?

  The SAP error message /IWFND/CM_MGW_RT122 indicates that there is an inconsistency with a navigation property in the context of an OData service. This error typically arises when the navigation property defined in the OData model does not match the underlying data model or when there are issues with the relationships between entities.
  Cause:
  
  Inconsistent Navigation Property: The navigation property &1 (which is a placeholder for the actual property name) of the data object &2 (which is a placeholder for the actual data object name) is not correctly defined or does not exist in the data model.
  Model Definition Issues: There may be discrepancies between the OData service metadata and the underlying data model in the ABAP backend.
  Missing Associations: The associations between entities may not be properly defined, leading to navigation properties that cannot be resolved.
  Data Model Changes: If there have been recent changes to the data model (like adding or removing fields or associations), the OData service may not have been updated accordingly.
  
  Solution:
  
  Check the OData Model: Review the OData service model in the SAP Gateway Service Builder (transaction code SEGW) to ensure that the navigation properties are correctly defined and match the underlying data model.
  Validate Associations: Ensure that all associations between entities are correctly defined and that the navigation properties point to valid entities.
  Regenerate the Service: If changes have been made to the data model, regenerate the OData service in the Service Builder. This can be done by right-clicking on the service and selecting "Generate Runtime Objects."
  Check Metadata: Use the OData service's metadata URL (e.g., /sap/opu/odata/sap/<service_name>/$metadata) to inspect the service's metadata and verify that the navigation properties and associations are correctly defined.
  Debugging: If the issue persists, consider debugging the OData service to trace where the inconsistency occurs. This may involve checking the implementation of the service methods (e.g., GET, POST) to ensure they handle navigation properties correctly.
  Check for Data Issues: Sometimes, the issue may arise from the data itself. Ensure that the data in the backend is consistent and that there are no orphaned records or broken relationships.
  
  Related Information:
  
  Transaction Codes: 
  
  SEGW: Service Builder for OData services.
  SE11: Data Dictionary to check the underlying database tables and structures.
  SE80: Object Navigator for checking the overall structure of the application.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues with OData services or specific error messages.
  Documentation: Review SAP documentation on OData services and the Gateway framework for best practices in defining navigation properties and associations.
  
  By following these steps, you should be able to identify and resolve the inconsistency causing the error message /IWFND/CM_MGW_RT122.