Passing values from 2d array into another function

For some reason what seems like a simple function has gone over my head as to why this doesn't work, so there must be some simple concept here I'm completely missing.

I have a 2d array full of values from a csv file and I know that row 1,2 has nothing important, but column 3 has all the classes from the CSV

So $twoDarray[3][*one through six] =
1. Name
2. Location
3. host
..etc
So I should be able to pass all rows of column 3 by strconvert($twoDarray[3]).
I've searched the forums but I could not find the solution to this probably simple problem.

Dim $oneDarray
$oneDarray=StringSplit($Rawfile, @CRLF, 1)
$columnsCounter = stringsplit($oneDarray[2],",")
Dim $twoDarray[$oneDarray[0] + 1][$columnsCounter[0] + 1]
For $x = 1 to ($oneDarray[0])
$oneRow = stringsplit($oneDarray[$x],",")
For $y = 1 to ($oneRow[0])
$twoDarray[$x][$y] = $oneRow[$y]
Next
Next 

strconvert($classes,$twoDarray[3])

Log Output
Array variable has incorrect number of subscripts or subscript dimension range exceeded.:
strconvert($classes,$twoDarray[3])
strconvert($classes,^ ERROR

Thanks,

Bob