Lua Error Debugging Needed

Title: Lua Error Debugging Needed

I am trying to create a new OS from different code ive written and or found online, and what I have so far has all been taken from different coded programs and pasted together. So without modification I get an error about line 137 saying "MOPT IS NIL"
I understand that nil means not possible, not a function, blah blah blah. My confusion is that mopt is used in a program ive used before perfectly fine, also in the program i took the code from it works perfectly fine. Plz help me find a solution!!! D:

A pastebin of the code is http://pastebin.com/upTVAHWU

EDIT: the full error is:


error: attempt to index global `mopt' (a nil value)

Interesting. Let's see the program you took the code from as well.

Look for some help over on the forums in programs and then DelOS..?

The menu system I got the most code from is at http://pastebin.com/nSmWUV6m
The OS I got the Download page code for is at http://pastebin.com/4EG3tBQz

I dont understand how It changed…. I never even messed with this line of code…

Engineer, on 19 February 2013 - 07:14 AM said:

Look for some help over on the forums in programs and then DelOS..?

Yes I used some DelOS code. And Ive looked on the forums, theres nothing about perfectly good code going all wonky.

How are you running this? Just straight from the command-line? You're not doing anything crazy like trying to load it as an API, right?

Just command line. Eventually going to put it as the startup program

Okay. If nobody else sees anything vastly wrong with this in the meantime, I'll try to remember to poke at it a little bit in ComputerCraft this evening.

Ok. I should probably mention that I changed that line to just say

drawMain() 

and it worked at getting the error out, but then you couldnt enter any of the pages for the menu. I figured Id rather solve an error then be frozen at the main menu.