Curiously I can't load this file 3dm inside SimLab Composer 6.1.11 Pro!
There is something special to make in Moi ?

A simple cube Boolen Diff with a Sphere!

No problem with Sat and Iges format!

http://moiscript.weebly.com/uploads/3/9/3/8/3938813/nurbs_moi.3dm