How To Fix /IWBEP/SBOD039 - Invalid type definition due to recursive base type assignment

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/SBOD -

• Message number: 039

• Message text: Invalid type definition due to recursive base type assignment

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/SBOD039 - Invalid type definition due to recursive base type assignment ?

  The SAP error message /IWBEP/SBOD039 Invalid type definition due to recursive base type assignment typically occurs in the context of SAP Gateway and OData services when there is an issue with the data model definitions, particularly with the way types are defined in the service.
  Cause:
  This error is generally caused by a recursive type definition in your OData service. A recursive type definition occurs when a type is defined in such a way that it references itself directly or indirectly, leading to an infinite loop in the type hierarchy. This can happen if:
  
  A complex type is defined to include itself as a property.
  There are circular references between types.
  The base type of a complex type is defined in a way that it leads back to the same type.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Type Definitions: Check the definitions of your complex types and ensure that none of them reference themselves directly or indirectly. Look for any circular references.
  
  
  Modify Type Hierarchies: If you find that a type is referencing itself, consider restructuring your data model. You may need to create a new type that does not lead back to the original type.
  
  
  Use Composition Instead of Inheritance: If you are using inheritance, consider using composition instead. This means instead of having a type inherit from another type that leads back to itself, you can include the necessary properties directly.
  
  
  Check Metadata: Use the SAP Gateway Client (transaction /IWFND/GW_CLIENT) to check the metadata of your OData service. This can help you identify where the recursive definitions are occurring.
  
  
  Regenerate Service: After making changes to the type definitions, regenerate the OData service and check if the error persists.
  
  
  Consult Documentation: Refer to the SAP documentation for guidelines on defining types and best practices to avoid recursive definitions.
  
  
  Related Information:
  
  SAP Gateway: This is the technology that allows you to create OData services in SAP. Understanding how it handles data models is crucial.
  OData Services: Familiarize yourself with OData service definitions, especially how complex types and entity types are structured.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  
  If the issue persists after following these steps, consider reaching out to SAP support or consulting with a developer who has experience with SAP Gateway and OData services.