Cut butter into dry cake mix until crumbly; reserve 1/3 cup of mixture. Press remainder into an 8 x 8 x 2 " baking dish, building up about 1/2 " around sides.

Spoon cherry pie filling over crumb mixture to 1/2 " of edge of pan. Combine reserved crumb mixture and pecans;sprinkle over fruit. Bake at 350 for about 45 minutes. Serve warm with shipped cream or ice cream.