How To Fix /IWBEP/CM_V4_MED243 - Parameter '&1' on action '&2' is not complex type based

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 243

• Message text: Parameter '&1' on action '&2' is not complex type based

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED243 - Parameter '&1' on action '&2' is not complex type based ?

  The SAP error message /IWBEP/CM_V4_MED243 indicates that there is an issue with the parameters being used in an OData service. Specifically, the error states that a parameter (denoted as &1) on a specified action (denoted as &2) is not of a complex type, which is required for the operation to proceed.
  Cause:
  
  Parameter Type Mismatch: The action you are trying to execute expects a parameter of a complex type, but the parameter provided is either a primitive type (like string, integer, etc.) or is not defined correctly in the OData service.
  Service Definition Issues: The OData service might not be correctly defined in the backend, leading to the system not recognizing the parameter as a complex type.
  Model Configuration: The data model used in the OData service may not be configured properly, leading to the mismatch in expected types.
  
  Solution:
  
  Check Parameter Definition: Review the definition of the action in the OData service. Ensure that the parameter is defined as a complex type in the service metadata.
  Update Service Metadata: If changes were made to the data model or service definition, regenerate the service metadata to ensure that the changes are reflected.
  Correct Data Types: Ensure that the data being sent to the action matches the expected complex type. If you are sending a JSON payload, make sure it is structured correctly according to the complex type definition.
  Debugging: Use transaction /IWFND/ERROR_LOG to check for any additional error messages that might provide more context on the issue.
  Testing with Tools: Use tools like Postman or SAP Gateway Client to test the OData service and verify that the parameters are being sent correctly.
  
  Related Information:
  
  OData Services: Understanding how OData services work in SAP, including the difference between primitive and complex types.
  SAP Gateway: Familiarize yourself with the SAP Gateway framework, which is responsible for exposing OData services.
  SAP Documentation: Refer to the official SAP documentation for OData services and the specific error message for more detailed troubleshooting steps.
  
  By following these steps, you should be able to identify and resolve the issue related to the error message /IWBEP/CM_V4_MED243.