In a large bowl, combine sugar and cornstarch; stir in the apples and cranberries. Transfer to a greased 2-qt. baking dish.
In another bowl, combine the oats, brown sugar, pecans and flour; cut in butter until mixture is crumbly. Sprinkle over apple mixture. Bake, uncovered, at 350° for 45-50 minutes or until golden brown. Serve warm. Serves 12.