How To Fix /IWBEP/CM_CP051 - Invalid V2 EDM conversion: Function return type '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 051

• Message text: Invalid V2 EDM conversion: Function return type '&1'

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 /IWBEP/CM_CP051 - Invalid V2 EDM conversion: Function return type '&1' ?

  The SAP error message /IWBEP/CM_CP051 Invalid V2 EDM conversion: Function return type '&1' typically occurs in the context of SAP Gateway and OData services. This error indicates that there is an issue with the conversion of a return type from a function module or method to the corresponding Entity Data Model (EDM) type in the OData service.
  Cause:
  
  Invalid Return Type: The function module or method is returning a data type that is not recognized or cannot be converted to a valid EDM type. This could be due to custom data types or unsupported types.
  Mapping Issues: There may be a mismatch between the return type defined in the function and the expected EDM type in the OData service.
  Configuration Errors: Incorrect configuration in the OData service or the service definition might lead to this error.
  
  Solution:
  
  Check Return Types: Review the function module or method that is being called. Ensure that the return type is a standard type that can be mapped to an EDM type. Common types include basic types like STRING, INT, DECIMAL, etc.
  Modify the Function: If the function is returning a custom or complex type, consider modifying it to return a standard type or create a suitable mapping for the custom type.
  Update Service Definition: If you have made changes to the function or its return type, ensure that the OData service definition is updated accordingly. You may need to regenerate the service or refresh the metadata.
  Check Annotations: Ensure that the annotations in the OData service are correctly defined to match the expected return types.
  Debugging: Use transaction SE80 or SE37 to debug the function module and check the actual return type being sent back. This can help identify discrepancies.
  
  Related Information:
  
  OData Services: Understanding how OData services work in SAP Gateway can help in troubleshooting these types of errors.
  EDM Types: Familiarize yourself with the Entity Data Model types and how they map to ABAP data types.
  SAP Notes: Check for any relevant SAP Notes or documentation that may address this specific error or provide additional context.
  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 identify the root cause of the error and implement a suitable solution.