My apologies it took me so long to reply, I eventualy discovered that you have a huge number of circles, in fact so many, the app runs out of memory. That’s something I can’t fix at the moment, I’m sorry.
@JimWike, you have a simular problem, although it seems you only a few lines, you DXF excists of 228 layers with a lot of tiny lines and rectangles.
@B.F. The app is only for DXF, not for Pdf’s or AI’s.