How To Fix /IWBEP/CM_OCI024 - Function Import '&1' has complex type as return type which is unsupported

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_OCI -

• Message number: 024

• Message text: Function Import '&1' has complex type as return type which is unsupported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_OCI024 - Function Import '&1' has complex type as return type which is unsupported ?

  The SAP error message /IWBEP/CM_OCI024 indicates that a function import in an OData service is returning a complex type, which is not supported in the context where it is being used. This typically occurs when the OData service is expected to return a simple type (like a primitive data type) but instead is trying to return a complex type (which is a structured type containing multiple properties).
  Cause:
  
  Complex Type Return: The function import is defined to return a complex type, which is not supported in certain scenarios, such as when the OData service is expected to return a simple type or a collection of simple types.
  Service Definition: The OData service might be incorrectly defined, where the return type of the function import does not match the expected return type in the client application or the OData model.
  Client Expectations: The client application consuming the OData service may not be able to handle complex types, leading to this error.
  
  Solution:
  
  Change Return Type: If possible, modify the function import to return a simple type instead of a complex type. This may involve changing the logic of the function to return a single value or a collection of simple values.
  Adjust Client Logic: If the function must return a complex type, ensure that the client application is capable of handling complex types. This may involve updating the client-side code to properly parse and utilize the complex type.
  Check OData Model: Review the OData model definition to ensure that the function import is correctly defined and that the return type aligns with what the client expects.
  Use a Different Endpoint: If the complex type is necessary, consider creating a different endpoint or function that can handle the complex type and is designed for the specific use case.
  
  Related Information:
  
  OData Version: Ensure that you are using a compatible version of OData that supports the features you need. Some versions may have limitations regarding complex types.
  SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional insights or updates regarding this error.
  Debugging: Use transaction codes like /IWFND/ERROR_LOG to check for additional error details or logs that can help diagnose the issue further.
  Testing: Test the function import using tools like Postman or SAP Gateway Client to see the raw response and understand how the data is being returned.
  
  By addressing the return type and ensuring compatibility between the OData service and the client application, you should be able to resolve the error.