How To Fix /IWBEP/SBOD328 - Complex Type Internal Name '&1' is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/SBOD -

• Message number: 328

• Message text: Complex Type Internal Name '&1' is not unique

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/SBOD328 - Complex Type Internal Name '&1' is not unique ?

  The SAP error message /IWBEP/SBOD328 Complex Type Internal Name '&1' is not unique typically occurs in the context of SAP Gateway and OData services. This error indicates that there are multiple complex types defined with the same internal name in the service metadata, which leads to ambiguity when the system tries to process or generate the OData service.
  Cause:
  
  Duplicate Definitions: The most common cause of this error is that there are duplicate complex type definitions in the Data Model (e.g., in the CDS views or service definitions).
  Multiple Service Implementations: If multiple OData services are trying to use the same complex type without proper differentiation, it can lead to this error.
  Inconsistent Naming: Sometimes, complex types may have been renamed or modified, but the old definitions still exist in the system, causing conflicts.
  
  Solution:
  
  
  Check for Duplicates: Review the definitions of complex types in your OData service. Ensure that each complex type has a unique name. You can do this by:
  
  Navigating to the relevant Data Model or CDS views in the SAP system.
  Checking the definitions for any complex types that may have the same name.
  
  
  
  Rename Complex Types: If you find duplicates, rename the complex types to ensure uniqueness. This can be done in the ABAP Development Workbench (SE80) or the relevant transaction for managing OData services.
  
  
  Clear Cache: After making changes, clear the cache for the OData service. You can do this using transaction /IWFND/MAINT_SERVICE to maintain the service and then use the "Clear Cache" option.
  
  
  Rebuild the Service: If the issue persists, consider regenerating the service. This can be done by:
  
  Deleting the service and re-adding it.
  Using transaction /IWFND/REG_SERVICE to register the service again.
  
  
  
  Check Service Implementation: If you have custom implementations, ensure that they are not inadvertently causing the duplication. Review the code and ensure that complex types are being referenced correctly.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  Documentation: Review the SAP Gateway documentation for best practices on defining and managing complex types.
  Community Forums: Consider searching or posting in SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service functions correctly without ambiguity in complex type definitions.