Edges show as black with vray 3.6

Hi guys.
I have problem with Vray 3.6 for sketchup 2018.
This is imagine after i rendered using Vray 3.6 for sketchup.
there is black tracing in objects when i rendered with vray 3.6 that is not appear with vray 2.0.

Who can show me why?
thanks so much

Can you upload the model so I can take a closer look?