For some strange reason some of the geometry is rendering fine in Render View but not appearing in the rendered animation.

Here is what renders in Render View:


Here is a frame from the animation:


I also get this in the Script Editor:
// Warning: TrenderPolyShape::sample: mesh 'bevelPolygonShape2' delivered an empty surface. //
// Warning: TrenderPolyShape::sample: mesh 'bevelPolygonShape1' delivered an empty surface. //

Any ideas?

Thanks