How To Fix /IWBEP/CM_V4_MED245 - Parameter '&1' on action '&2' is not primitive type based

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 245

• Message text: Parameter '&1' on action '&2' is not primitive 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_MED245 - Parameter '&1' on action '&2' is not primitive type based ?

  The SAP error message /IWBEP/CM_V4_MED245 indicates that there is an issue with the parameters being passed to an action in an OData service. Specifically, the error states that the parameter &1 on action &2 is not of a primitive type. This typically occurs when the OData service is expecting a primitive data type (like string, integer, boolean, etc.) but is receiving a complex type or an unsupported data type instead.
  Cause:
  
  Incorrect Parameter Type: The parameter defined in the OData service is expected to be a primitive type, but it is defined as a complex type in the service metadata or in the request.
  Service Definition Issues: There may be a mismatch between the service definition and the actual implementation, where the action is defined to accept a primitive type but is being called with a complex type.
  Client-Side Issues: The client application (e.g., SAP Fiori, custom UI) may be incorrectly sending the data type for the parameter, leading to this error.
  
  Solution:
  
  Check OData Service Metadata: Review the metadata of the OData service to ensure that the parameter types are correctly defined as primitive types. You can access the metadata by appending $metadata to the service URL.
  Review Action Definition: Ensure that the action definition in the OData service is correctly set up to accept the expected primitive types. This can be done in the service implementation (e.g., in the ABAP backend).
  Adjust Client Request: If you are calling the OData service from a client application, ensure that the parameters being sent in the request match the expected primitive types. For example, if the service expects an integer, ensure that you are not sending a string or a complex object.
  Debugging: Use debugging tools to trace the request and response. Check the payload being sent to the OData service and verify that it matches the expected format.
  Testing with Postman or Similar Tools: You can use tools like Postman to manually test the OData service and see if you can replicate the error. This can help isolate whether the issue is with the service or the client application.
  
  Related Information:
  
  OData Protocol: Understanding the OData protocol and how it handles data types can be beneficial. OData supports both primitive and complex types, and knowing the difference is crucial for troubleshooting.
  SAP Gateway: Familiarize yourself with SAP Gateway and how it manages OData services, as this can provide insights into how to define and implement actions and parameters correctly.
  SAP Community and Documentation: Check the SAP Community forums and official SAP documentation for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify the root cause of the error and implement the necessary changes to resolve it.