Finds arcs in a polygon

Hi, 

I have a lot of polygons. I want to identify these ones who contain arcs.

1. option: the polygon is made of lines only

2. the polygon is made of lines and arcs

I want to filter out all the polygons that contain lines only (option 1). I want to keep the ones that contain arcs (option 2). I tried the geometry property extractor but all polygons are always rejected : MISSING_GEOMETRY_PROPERTY as the error message. I don’t understand why. pls advise.