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

/IWBEP/CM_V4_MED245 - Overview

• 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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/IWBEP/CM_V4_MED245 - Details

• 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