Dump undrained pineapple into greased 13x9x2 inch pan, spread evenly. Dump pie filling on top and spread evenly.
Dump dry cake mix onto cherry layer; spread evenly. Sprinkle pecans over cake mix. Put sliced butter on top.
Bake at 350 for 48 to 53 minutes. Serve warm or cooled.
My husband doesn't like cherry that well so I would some times substitute blueberry pie filling. And some times I would put cherry on half and blueberry on the other half. Use whats in your cabinet or your families favorite.