Error:62 Attempt To Index Nil Value

i get this when I clearly define all variabes it uses bit it still shows error: 62: attempt to index nil value code is here: http://pastebin.com/UMZcz4cL I have put in print(varName) and it works fine

You're calling countSurround with the width of the table, so when you try to index map[width + 1][y], there is no element at index width + 1. You'll need to check for that.