Heat oven to 180ºC . Grease 33 cm x 23 cm pan. In large bowl, combine cake mix, 6 TABLESPOONS margarine and 1 CUP rolled oats. Mix until crumbly. Reserve 1 cup crumbs for topping. To remaining crumbs, add 1 egg; mix until well blended. Press into prepared pan. Pour cherry pie filling over crust, spread to cover. To reserved crumbs, in large bowl, add remaining quarter cup rolled oats, 2 T margarine, nuts and brown sugar. Beat until thoroughly mixed. Sprinkle over cherry mixture. Bake at 180ºC or 30-40 minutes or until golden brown. Cool completely. Cut into small squares.