Hehe
Damned you had the good reflex !
Absolutly not thinked to press the key "Hide" :D
And yes it's normal, start file is just wireframes without face !
So your import Iges rocks !

PS Does Moi has an automatic function to transform these wireframes in surfaces or volumes or solids ?
But maybe I am a donkey because it's wireframes from "polygones" modeling so the shere can be smooth by Moi isn't it? :D