Why does the chamfer aren't present in a N-gons export (.obj)

 From:  jdestoppani
5776.1 
Hello,
I'm a beginner in MoI use and I am trying the Beta version of this product.
I am looking for a soft like MoI or Rhino which can help me to make an interface between the R&D (inventor) and me who use Cinema 4D for animation and rendering.

Today I have open an igs model in MoI, create chamfer on different edges of my model and I have made an export .obj with N-gons option but i can't see in the wireframe view the chamfer I'have made before.

Could you explain me the reason ?

Thank you in advance
Jolo