[HELP !] turtle follows a path

Hi,
I create an API for a turtle to follow a path.
But it does not work at the "waystop" more accurately to my variable "stop".

Please help me,
I look for 4 hours without result and sorry for my bad english.

CODE : http://www.pastebin.com/bAUmrgHy

Moved to Ask a Pro.

The API code looks fine to me, unless I'm missing something. Did you want to change variable "stop" outside of the API? If so, you'll need a function to do it, ie: function stop() stop = true end

can you give me more explanation please

Okay, sorry a delete the first line "stop = false" and it's work.
thanks for the help.