Face.vertices error (clueless student)

Revit
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Warning: Face.Vertices expects argument type(s) (Autodesk.DesignScript.Geometry.Face), but was called with (Autodesk.DesignScript.Geometry.Solid).

Hello, im a university student trying to learn dynamo and ive run into a bit of a problem. Im currently trying generate a parametric roof from my column structure however I keep running into the same error message even when using the testing file youtuber presented.

im really not to sure where to go next as i am quite the beginner at this. Any help would be greatly appreciated.

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Read the error message carefully. The node needs a face to work. You have given it a solid. Imagine asking a calculator to divide :honeybee: by :lemon:. It makes no sense to you or the calculator.

Try using this node instead: Topology.Verticies Dynamo Dictionary.

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All right thank you ill give that a go. thank you for the quick response.

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awhhh your a star thank you that worked like a treat

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