Invalid argument #3, even though there's no argument #3

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#1

I am scripting a module that converts RetroStudio studio selections to Roblox objects, however, whenever I try to execute testing module code without running the game in studio, this error appears:

Error found! Error: ServerScriptService.MainModule:34: invalid argument #3 (Instance expected, got string)

Despite the fact that none of my functions intake 3 parameters, it still throws this issue anyway. Here’s the module code:

local httpService = game:GetService("HttpService")

local function findInstance(path)
	local split = path:split(".")
	if #split == 0 then return end
	
	local constructed = split[1]:lower() == "workspace" and workspace or game
	
	for i=2, #split do
		constructed = constructed[split[i]]
	end
	
	return constructed
end

assert(httpService.HttpEnabled, "HttpService must be enabled via the code: \"game.HttpService.HttpEnabled = true\" in the command line")

return function(json)
	local startTime = os.clock()
	json = httpService:JSONDecode(json)
	
	local success, fail = pcall(function()
		for cn, props in pairs(json) do
			local obj = Instance.new(cn)

			for n, v in pairs(props) do
				obj[n] = n == "Parent" and findInstance(v) or v
			end
		end
	end)
	
	if not success then warn("Error found! Error:", fail) end
	
	local endTime = os.clock()
	print("Exported in:", endTime - startTime)
end

Here’s my command-line code, for testing:

local tab = {Part = {Name = "Billy", Parent = "Workspace"}} local test=game.HttpService:JSONEncode(tab) require(game.ServerScriptService.MainModule)(test)

TLDR; When I test my module with command line code without pressing F8, it just breaks.
Edit: Literally forgot to restart studio. Can’t they just listen for script source changes in the command line?!

#2

I happened to test this script myself since I didn’t see an apparent error. However, upon testing, I noticed that there were, in fact, no errors? Is this the entire script? Line 34 is an os.clock() call, which obviously isn’t the problem.

#3

uh for the last print try

print("Exported in:" ..  endTime - startTime)

(i do not understand this code it all so this might not be soltuton

#4

A mistake on Roblox Studio’s end; it just so happened to be that the command line didn’t update the module script source during command line execution, and instead used my old module script source.

Just a bug with Roblox Studio and not my script, sorry if I’ve caused confusion.

#5

The last print just calculates how much time the script took to export the JSON into Roblox objects.