Power Platform Community Forum Thread Details

Unable to Pass “file” Parameter from Copilot Studio to Power Automate – Record Type Mismatch Error

Description:
I have a Power Automate flow that is designed to accept a file input (image/document). However, when I try to trigger this flow from Copilot Studio, I receive a type mismatch error like the following:

{
  "$kind": "BindingIncorrectTypeError",
  "bindingKey": "file",
  "inputDisplayName": "file",
  "typeError": {
    "$kind": "IncorrectTypeError",
    "expectedType": { "$kind": "Unspecified" },
    "assignedType": {
      "$kind": "Record",
      "properties": { ... }
    }
  }
}

Issue Summary:

My Power Automate flow expects a file parameter (of file type).
Copilot Studio attempts to pass this input as a Record.
This causes a BindingIncorrectTypeError on the Power Automate side.

Expected Behavior:

Copilot Studio should be able to pass file inputs in a format that Power Automate recognizes as a valid file (e.g., including name, contentBytes, and contentType). Currently, it sends a Record object which leads to a mismatch.

Use Case:

The user uploads an image or document via Copilot Studio. This file needs to be sent to Power Automate for processing in other systems. However, sending the file is currently blocked due to type incompatibility.

Request:

Please add support for Copilot Studio to send file inputs to Power Automate flows in a format that is accepted as a true file input.