Multiple files: attempt to call nil

I am trying to split up a rather large program into multiple files. A sample program is shown below:

--File1
local M = {}
M.variable = 5
return M

--File2
obj = require('File1') <- Error found here
println(obj.variable)

Is this not the way to include other files with the file you are working on?

The module system of Lua is not included in CC. You'll have to do something like this:

--File1
local M = {}
M.variable = 5
return M

--File2
local f, err = loadfile("full/path/to/File2") -- load the file as a Lua function
assert(f, err) -- error out if there is something wrong with the file
local obj = f()
print(obj.variable)

And if you want to be a good citizen, you'd set the environment on f so that any globals it declares are in the environment you created instead of _G.

Ah, perfect. Thanks a lot.