Hello everyone. Just installed and registered v21. I have a dxf file I created using emachineshops' free cad program. I believe it is based off AutoCad. I try importing and using v 21 to make a solid out of it and all is going ok. However, when I save it and try to reopen it, the file is either blank or missing a lot of elements. I tried to save to both bobcad and onto a floppy disc to see if either way will work and nothing. Probably operator error since I am a noob, but if anyone has any ides what is going wrong I'd appreciate the help greatly.