'Unable to cast value to Objects' error while trying SubtractAsync()

Help and Feedback Scripting Support
#1

I have this wall:

image
image1034×597 39.8 KB

… and this window:

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image994×435 107 KB

I want to subtract the window from the wall to create a hole:

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image955×586 36.4 KB

… using this:

local Wall = workspace.Wall.Body
local Window = workspace.Window.Frame
local NewWall = Wall:SubtractAsync(Window)

… but I get this error on line 3:

Unable to cast value to Objects

Here the current file to test:
Baseplate.rbxl (58.2 KB)

What’s wrong?

#2

Nvm, the part to be subtracted should be an array, so it should be declared inside {}:

local Wall = workspace.Wall.Body
local Window = {workspace.Window.Frame} -- <<<<
local NewWall = Wall:SubtractAsync(Window)