I'm not familiar with the software you're using, but....I did play with your drawing a bit and I figured out that some of it would go into 3-D in Cad but there were 364 objects that would not. I believe that maybe your problem is that the objects in your drawing are not a polyline. Possibly the software you're using needs the images to be a polyline just as the objects need to be a polyline to be 3-D in Auto-Cad. If you can go into your drawing and look up the help where it tells you how to turn several lines into one polyline and then maybe you might get results with that. I'm not sure like I said I've never used the software you mentioned but I think that may be part of the problem.