Every time I import a dwg file into solidworks, 2d or 3d, the lines do not appear. I've tried changing the hide/show items but no luck, the lines are there but they are invisible.

If I close and re-open the solidworks file, it gets a bit better as I can see the lines then, but they still become invisible when I orbit them.

Seems to be a graphic glitch, anyone else experiencing the same thing?