Spread cherry pie filling in bottom of ungreased 13x9x2 inch pan. Cover evenly with crushed pineapple. Sprinkle with dry cake mix. Cover with pecans. Spread margarine slices evenly over all. Bake at 350 degrees for 25-30 minutes or until done. When completely cool, cover with whipped cream (or cool whip) or place a dollop of whipped cream on each piece when served. ----