Turtle Branch Coding Error

Hello anyone who is smart with this sort of stuff.
I have been trying to code a turtle for the last 30 minutes to make a nice and secure branch mine for me that I could just walk down without any lava troubles or ravine holes.
I did everything right, he plugs up the holes but he only goes 1 block, so I added a code to make him go as much blocks that I sent him to go and it comes out with the error Branch:4: attempt to call string

Here is the code, if anyone could suggest how to fix it or could fix it for me that would be much appreciated. Thank you :)/>

http://pastebin.com/Apg7Fe7m

did you give him arguments in the call? like from the shell, did you do "Branch 16" or did you do "Branch"?

Doyle3694, on 05 January 2013 - 11:26 PM said:

did you give him arguments in the call? like from the shell, did you do "Branch 16" or did you do "Branch"?

Just tested it now and the

togo = togo or 1

will make it 1 if you don't enter an argument.

Try using a new turtle?

yeah but the line before is the one with the error, that's why I'm asking.

Also, the thing I'm starting to suspect is that you have a string somewhere in another program that has the variablename tonumber

Yeah, it's telling you that tonumber is a string rather than a function. That's not the way things is supposed to be.