How To Fix /IWBEP/CM_V4_MED379 - Non-binding params for functions must be of non-collection primitive type

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 379

• Message text: Non-binding params for functions must be of non-collection primitive type

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED379 - Non-binding params for functions must be of non-collection primitive type ?

  The SAP error message /IWBEP/CM_V4_MED379 indicates that there is an issue with the parameters being passed to a function in an OData service. Specifically, the error states that non-binding parameters for functions must be of a non-collection primitive type. This typically occurs when the function is expecting a single value (a primitive type) but is instead receiving a collection or an unsupported type.
  Cause:
  
  Parameter Type Mismatch: The function is defined to accept non-binding parameters, which should be of a primitive type (like String, Int, Boolean, etc.), but the input provided is either a collection (like an array or list) or a complex type.
  OData Service Definition: The OData service might be incorrectly defined, where the parameter types in the service metadata do not match the expected types in the implementation.
  Client Request: The client (e.g., an application or a frontend) might be sending a request with incorrect parameter types.
  
  Solution:
  
  Check Function Definition: Review the function definition in the OData service to ensure that the parameters are defined correctly as non-collection primitive types.
  Validate Input Parameters: Ensure that the input parameters being sent in the request are of the correct type. If a parameter is expected to be a single value, ensure that it is not being sent as an array or collection.
  Update Client Code: If the error is coming from a client application, update the code to ensure that it sends the correct parameter types as defined in the OData service.
  Test with Postman or Similar Tool: Use tools like Postman to manually test the OData service and verify that the parameters are being sent correctly.
  Check Service Metadata: Review the service metadata (usually accessible via the $metadata endpoint) to confirm the expected types for the function parameters.
  
  Related Information:
  
  OData Protocol: Understanding the OData protocol and how it handles function imports and parameters can help in diagnosing issues related to parameter types.
  SAP Gateway: Familiarize yourself with SAP Gateway and how it manages OData services, as this can provide insights into how to define and troubleshoot service functions.
  SAP Notes and Documentation: Check SAP Notes and official documentation for any known issues or updates related to the specific version of SAP you are using.
  
  By following these steps, you should be able to identify the root cause of the error and implement the necessary changes to resolve it.