It could be done... Why not PM Didier and ask his advice/help - he's a master at importing .csv data and making geometry AND 'arc' making...

thank you very much for your quick answer. i need to make a tunnel so i must draw the line and after follow it with my face. As a difficult face to make, i need to use again but not re-draw it all the time. So the best way to do this is to duplicate like you said me. it works perfectly! you can make a group too for the same results but i'm thinkig that it will be limitation for my model.

I belive that beta testers will get a free license.