Unable to cast to dictionary?

[Eh_Canadian0]

I’m trying to make an elevator door which opens up with a tween after a short intermission, however I get the error Unable to cast to dictionary at line 28 when trying to setup the tween. Why is that?

Here’s the script (excludes content not related to the tween):

local DoorParts = game:GetService("Workspace").Doors

local LD = DoorParts.LeftDoor
local LO = DoorParts.LO.CFrame -- Left door closed goal
local LC = DoorParts.LC.CFrame -- Left door closed goal

local RD = DoorParts.RightDoor
local RO = DoorParts.RO.CFrame -- Right door open goal
local RC = DoorParts.RC.CFrame -- Right door closed goal

local TweenService = game:GetService("TweenService")
local TweenStyle = TweenInfo.new(.5, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0)

local OpenTweenL = TweenService:Create(LD, TweenStyle, LO) -- WHERE I GET ERROR MESSAGE  (line 28)
local OpenTweenR = TweenService:Create(RD, TweenStyle, RO)

local ClosedTweenL = TweenService:Create(LD, TweenStyle, LC)
local ClosedTweenR = TweenService:Create(RD, TweenStyle, RC)

-- pick world

local function pickworld()
	local topick = math.random(1, #Worlds:GetChildren())
	
	local copy = Worlds[topick]:Clone()
	copy.Parent = ActiveWorld
end

-- open doors

local function opendoors()
	
	OpenTweenL:Play()
	OpenTweenR:Play()
end

Here's the script in whole as well in case that helps

local ActiveWorld = game:GetService("Workspace").ActiveWorld
local Worlds = game:GetService("ServerStorage").Worlds
local WorldTimer = game:GetService("ReplicatedStorage").Timer.WorldTimer

local players = game:GetService("Players")

local TimeperWorld = 0.1 -- (minutes)
local ElevatorTime = 15 -- (seconds)

local intermission = false

-- Door parts

local DoorParts = game:GetService("Workspace").Doors

local LD = DoorParts.LeftDoor
local LO = DoorParts.LO.CFrame -- Left door closed goal
local LC = DoorParts.LC.CFrame -- Left door closed goal

local RD = DoorParts.RightDoor
local RO = DoorParts.RO.CFrame -- Right door open goal
local RC = DoorParts.RC.CFrame -- Right door closed goal

local TweenService = game:GetService("TweenService")
local TweenStyle = TweenInfo.new(.5, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0)

local OpenTweenL = TweenService:Create(LD, TweenStyle, LO) -- WHERE I GET ERROR MESSAGE (line 28)
local OpenTweenR = TweenService:Create(RD, TweenStyle, RO)

local ClosedTweenL = TweenService:Create(LD, TweenStyle, LC)
local ClosedTweenR = TweenService:Create(RD, TweenStyle, RC)

-- pick world

local function pickworld()
	local topick = math.random(1, #Worlds:GetChildren())
	
	local copy = Worlds[topick]:Clone()
	copy.Parent = ActiveWorld
end

-- open doors

local function opendoors()
	
	OpenTweenL:Play()
	OpenTweenR:Play()
end

-- close doors

local function closedoors()
	-- ClosedTweenL:Play()
	-- ClosedTweenR:Play()
end

-- waiting between levels

local function intermission()
	
	local timeleft = ElevatorTime

	while timeleft > 0  do
		timeleft = timeleft - 1

		wait(1)

		WorldTimer:FireAllClients(timeleft)
		
		if timeleft== 0 then
			pickworld()
			
			opendoors()
		end
	end
end

-- level

while true do
	intermission()
	
	wait (ElevatorTime)
	
	local timeleft = TimeperWorld * 60
	
	while timeleft > 0  do
		timeleft = timeleft - 1
		
		wait(1)
		
		WorldTimer:FireAllClients(timeleft)
	end
end

[SeargentAUS (Seargent)]

When using TweenService:Create(), the third parameter needs to be a dictionary, stating what properties change and to what they change to.

e.g.

{Position=Vector3.new(5, 1, 0), CFrame = CFrame.new(50,123,5219,1, 1, 1, 0, 0, 0)}

In your script, you seem to only be wanting to change the CFrame, so it will end up like this:

local DoorParts = game:GetService("Workspace").Doors

local LD = DoorParts.LeftDoor
local LO = DoorParts.LO.CFrame -- Left door closed goal
local LC = DoorParts.LC.CFrame -- Left door closed goal

local RD = DoorParts.RightDoor
local RO = DoorParts.RO.CFrame -- Right door open goal
local RC = DoorParts.RC.CFrame -- Right door closed goal

local TweenService = game:GetService("TweenService")
local TweenStyle = TweenInfo.new(.5, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0)

local OpenTweenL = TweenService:Create(LD, TweenStyle, {CFrame=LO}) -- WHERE I GET ERROR MESSAGE  (line 28)
local OpenTweenR = TweenService:Create(RD, TweenStyle,  {CFrame=RO})

local ClosedTweenL = TweenService:Create(LD, TweenStyle, {CFrame=LC})
local ClosedTweenR = TweenService:Create(RD, TweenStyle, {CFrame=RC})

-- pick world

local function pickworld()
	local topick = math.random(1, #Worlds:GetChildren())
	
	local copy = Worlds[topick]:Clone()
	copy.Parent = ActiveWorld
end

-- open doors

local function opendoors()
	
	OpenTweenL:Play()
	OpenTweenR:Play()
end