gistfile1.txt

Error #1009: Cannot access a property or method
of a null object reference.

gistfile2.txt

Error #1034: Type Coercion failed: cannot
convert classes::Sprite@8b69259 to mx.core.IUIComponent.

gistfile3.as

var bouncingBall:UIComponent = new UIComponent();
bouncingBall.addChild(new BouncingBall(myCanvas.width,
                                       myCanvas.height));
myCanvas.addChild(bouncingBall);

gistfile4.as

var bouncingBall:BouncingBall = new BouncingBall(myCanvas.width,
                                                 myCanvas.height);
myCanvas.rawChildren.addChild(bouncingBall);