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Preheat oven to 350 degrees.
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In a mixing bowl, stir together apple pie filling, cinnamon, and caramel. Pour into the bottom of a 9 by 13 baking dish. Spread into an even layer.
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In another bowl, mix together cake mix and oatmeal. Pour over the apple pie filling into a single layer. I only used about 3/4 of this mixture. Discard the rest.
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Top with pecans and evenly pour butter over the entire cake. Then place in the oven.
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Cook for 40-55 minutes, or until caramel bubbles through the topping and a toothpick inserted into the topping comes out clean. If your pecans or corners start to get too brown, cover with aluminum foil for the last 10-15 minutes.
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Serve warm with ice cream or whipped topping.