Preheat oven to 350 degrees.
Spray your 9 x 13 pan with nonstick cooking spray.
If you are using the chopped pecans, spread them on the first layer.
Next is the pineapple layer and then the cherry pie filling.
Now, gently spread the dry cake mix equally over the fruit.
Melt the butter and pour over the cake mix, trying to fully cover it all as much as possible.
Bake on 350 degrees 25-30 minutes, until brown and bubbly.
Remove to wire rack to cool for 5-10 minutes. Serve & enjoy!