How To Fix /IWPGW/TGW_TCM_MSG010 - Type of result is not supported - entity or complex type expected

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWPGW/TGW_TCM_MSG -

• Message number: 010

• Message text: Type of result is not supported - entity or complex type expected

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 /IWPGW/TGW_TCM_MSG010 - Type of result is not supported - entity or complex type expected ?

  The SAP error message /IWPGW/TGW_TCM_MSG010 with the description "Type of result is not supported - entity or complex type expected" typically occurs in the context of SAP Gateway services, particularly when dealing with OData services. This error indicates that the response type being returned from the service is not in a format that the SAP Gateway can process. Here are some potential causes, solutions, and related information:
  Causes:
  
  
  Incorrect Data Type: The service might be returning a primitive data type (like a string or integer) instead of an entity or complex type. OData services expect responses to be in the form of entities or complex types.
  
  
  Service Definition Issues: The OData service might not be correctly defined in the service metadata. This could include issues with the service's data model or the way entities are defined.
  
  
  Model Binding Issues: There may be issues with how the data model is bound to the OData service, leading to incorrect data being returned.
  
  
  Implementation Errors: If the service implementation (e.g., the method that fetches data) is not correctly returning the expected structure, this error can occur.
  
  
  Version Mismatch: There could be a mismatch between the expected OData version and the version being used in the service.
  
  
  Solutions:
  
  
  Check Service Implementation: Review the implementation of the OData service to ensure that it is returning the correct data types. Make sure that the response is structured as an entity or complex type.
  
  
  Review Metadata: Check the service metadata (usually accessible via the service URL with $metadata appended) to ensure that the entity types and complex types are correctly defined.
  
  
  Adjust Data Model: If the data model is incorrect, adjust it to ensure that the service returns the expected types. This may involve modifying the underlying data structure or the way data is fetched.
  
  
  Debugging: Use debugging tools to trace the execution of the OData service and identify where the incorrect data type is being returned.
  
  
  Check OData Version: Ensure that the OData service is compatible with the version expected by the client consuming the service. If necessary, update the service or the client to align the versions.
  
  
  Testing with Tools: Use tools like Postman or SAP Gateway Client to test the OData service independently and see the raw response. This can help identify if the issue is with the service itself or how it is being consumed.
  
  
  Related Information:
  
  SAP Gateway Documentation: Refer to the official SAP Gateway documentation for guidelines on creating and consuming OData services.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they found.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide patches related to this error.
  
  By following these steps, you should be able to diagnose and resolve the error message /IWPGW/TGW_TCM_MSG010.