How do I make a door?(Sliding Door)(Not tweeninfo) This door keeps on giving errors on the output.

Hey, theres a few problems with your code. Starting with the OpenDoor function, you have a small typo here:

 door1.CFrame = door1.CFframe * CFrame.new(0,0,0.08) * CFrame.fromEulerAnglesXYZ(0,0,0)

where you had an extra 'f' in door1.CFrame. Next, you called the event from within the function itself, so the event never connects when the script starts. To fix this, move the event to outside of the function.

function OpenDoor()
	--openn door code
end

script.Parent.ClickDetector.MouseClick:connect(OpenDoor)

You should end up with something similar to this:

local doubledoor = script.Parent.Parent
local door1 = doubledoor.Doors.Door1.Mainframe
local door2 = doubledoor.Doors.Door2.Mainframe
local click = script.Parent.ClickDetector
local IsOpen = false

function OpenDoor()
    for i = 1,45 do
        door1.CFrame = door1.CFrame * CFrame.new(0,0,0.08) * CFrame.fromEulerAnglesXYZ(0,0,0)
        wait()
	end
end

script.Parent.ClickDetector.MouseClick:connect(OpenDoor)

edit: whoops, just saw your code and realized you didn't connect the event from in the function, my mistake. The above code should still work though.