/IWBEP/SBOD331 - Navigation Property Internal name '&1&2&3' is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/SBOD -

• Message number: 331

• Message text: Navigation Property Internal name '&1&2&3' is not unique

Self-Explanatory Message

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AnswerBot

• What is the cause and solution for SAP error message /IWBEP/SBOD331 - Navigation Property Internal name '&1&2&3' is not unique ?

  The SAP error message /IWBEP/SBOD331 indicates that there is an issue with the navigation property in an OData service. Specifically, the error message states that the internal name of the navigation property is not unique. This can occur in various scenarios, particularly when defining or consuming OData services in SAP Gateway.
  Cause:
  
  
  Duplicate Navigation Properties: The error typically arises when there are multiple navigation properties defined with the same internal name in the data model. This can happen if:
  
  The same navigation property is defined in multiple entities.
  There are naming conflicts due to similar or identical names in the underlying data model.
  
  
  
  Model Configuration Issues: If the OData service is generated from a data model that has not been properly configured, it may lead to non-unique navigation property names.
  
  
  Changes in Data Model: If the data model has been modified (e.g., adding or renaming navigation properties) without properly regenerating the OData service, it can lead to inconsistencies.
  
  
  Solution:
  
  
  Check Navigation Properties: Review the entity types in your OData service to ensure that all navigation properties have unique internal names. You can do this by:
  
  Going to the SAP Gateway Service Builder (transaction code SEGW).
  Checking the properties of each entity type and ensuring that navigation properties do not have conflicting names.
  
  
  
  Regenerate the OData Service: If you have made changes to the data model, regenerate the OData service:
  
  In the Service Builder, right-click on the service and select "Generate Runtime Objects."
  This will update the service and ensure that the metadata is consistent with the current model.
  
  
  
  Check for Annotations: If you are using annotations, ensure that they are correctly defined and do not conflict with the navigation properties.
  
  
  Clear Cache: Sometimes, caching issues can lead to this error. Clear the cache of the OData service:
  
  Use transaction code /IWFND/MAINT_SERVICE to maintain the service and clear the cache.
  
  
  
  Debugging: If the issue persists, consider debugging the OData service to trace where the conflict is occurring. You can use transaction SE80 or SEGW to analyze the service implementation.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  OData Documentation: Review the official SAP documentation on OData services and the Gateway framework for best practices in defining navigation properties.
  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 resolve the /IWBEP/SBOD331 error and ensure that your OData service functions correctly.