An annoying problem has been plaguing me for some time now. I work with ACAD 2002 at a mill work manufacturing facility. Part of my job is also to program a CNC machine. Now my problem is that the software for the CNC requires our drawings to be in the R13.DXF format. The majority of time the DXFOUT command works fine, but occasionally, for some reason unknown to me, the process that usually only takes a second, lasts for a few minutes and then the file is not usable. It seems like some of the files are "contaminated" somehow. Even if I copy a single line from a "contaminated" drawing to another drawing, the second drawing will no longer export properly. Has anyone else run into any similar problems?