[F8] Why does the variable lose definition?

[a_modified_dog]

or break it down even further to check the logic -

downM.onRelease = function() {
varInc = _root.i++;  trace(varInc);
_root.goalY = _root.myYArray[varInc];  trace(_root.goalY); // 
slideY(_root.goalY);
};

function slideY(num) {
trace(num);
_root.dataFile.onEnterFrame = function() {
_root.dataFile.diff = Math.abs(_root.dataFile._y - num);
trace(_root.dataFile.diff);
....
} 

[Thomas D.Garrod]

dawsonk's tip was right-on. Adding _root to the u and i, made the difference. Now I need to fix the lack of limits. The scrolling worked initially and then erratcally, then not at all. Debug showed that the index was at a negative position.

But this is progress!

Dog, you are quite right to provide debug guidance. These tips are greatly appreciated (I want to catch my own fish).