Heat oven to 350 deg..In a large mixing bowl,combine,flour,baking soda and sugar.Add eggs,pineapple,with its juice,and nuts;mix well.Pour into lightly greased 9 inchx13 inchx2 inch baking pan.Bake 35 to 45 minutes.Cool. Beat softened cream cheese until fluffy.Whip in confectioners'sugar and softened butter.Spread the whipped cream cheese mixture over the cooled cake.Cut in 8 cm squares.Makes dozen servings...