Caput

I am working on a project that uses 2 screens and one GPU per screen.  My code selects each component by its address.  But when I try to bind a gpu to a screen I get the error: attempt to call field 'bind' (a nil value).

local component = require("component")
local term = require("term")
local gpu = component.get("3085")
local screen = component.get("40c6")

gpu.bind(screen)

I have verified that the addresses are correct and I have tried to assign the components to their full addresses.  I'm sure my mistake is pretty simple.  Any help would be greatly appreciated.

Thanks in advance.