How To Fix FDT_CP_MSG217 - Type of result is not supported - entity or complex type expected

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CP_MSG -

• Message number: 217

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

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_CP_MSG217 - Type of result is not supported - entity or complex type expected ?

  The SAP error message FDT_CP_MSG217 ("Type of result is not supported - entity or complex type expected") typically occurs in the context of SAP Fiori or SAP Gateway services when there is an issue with the data type being returned from a service or function module. This error indicates that the system expected a certain type of data structure (like an entity or complex type) but received something else, such as a primitive type or an unsupported format.
  Causes:
  
  Incorrect Data Type: The service is returning a primitive data type (like string, integer, etc.) instead of a complex type or entity that the consumer expects.
  Service Definition Issues: The OData service or the data model might not be correctly defined, leading to mismatches in expected data types.
  Mapping Errors: There could be issues in the mapping between the backend data structure and the OData service definition.
  Incompatible Changes: Changes made to the underlying data model or service definition that are not reflected in the service implementation.
  
  Solutions:
  
  Check Service Definition: Review the OData service definition in the SAP Gateway Service Builder (transaction code SEGW) to ensure that the expected entity types and complex types are correctly defined.
  Review Data Model: Ensure that the data model being used in the service is correctly defined and that the expected types match what is being returned.
  Debugging: Use transaction code /IWFND/ERROR_LOG to check for any additional error messages or logs that can provide more context about the issue.
  Adjust Data Return: If you have access to the backend code, ensure that the data being returned from the function module or method is of the correct type. You may need to wrap primitive types in a complex type or entity.
  Regenerate Service: If changes were made to the data model or service definition, regenerate the service and re-activate it to ensure that all changes are applied.
  Check for Updates: Ensure that your SAP system is up to date with the latest support packages and notes, as there may be fixes related to this issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  OData Documentation: Review SAP documentation on OData services and data types to ensure compliance with expected structures.
  Community Forums: Engage with SAP Community forums or Stack Overflow for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.