In large mixing bowl beat together softened margarine and brown sugar until creamy. Add eggs one at a time then vanilla and stir in. Mix together oats, flour, baking soda and salt. Gradually add oatmeal mixture to margarine mixture, beating in to well-blended. Spoon 2 cups of the dough and set aside. Grease 15 1/2" X 10 1/2" jelly roll pan. Press remaining dough into of bottom of the pan.
Filling: In microwave, melt margarine. Add semisweet chocolate chips, cook on medium until chocolate starts to melts, stirring frequently until chips are melted. Stir in sweetened condensed milk and vanilla until uniform in color. Stir in raisins and coconut flakes. Spread the filling over the crust in the jelly roll pan. Scatter small pieces of the remaining dough over filling. Bake 25 minute or until top is golden brown at 350F. Cool completely on wire rack. Cut into bars. Makes 30 pieces. Per serving 255.5 calories, 9.7 grams fat, 33.5% from fat.