The only thing that I can think of that I haven't addressed are 3D faces. I have taken into account DGN linetypes and used the -PURGE command to purge 'orphaned data'. This reduces the dwg file size slightly but when exported to dxf it increases dramatically. I have wrote a LISP that will do the following I'm having difficulty with a lot of the files because they are being produced in various softwares and seem to contain a lot of unrecognised (for want of a better phrase!) information within AutoCAD. As part of my day to day work on my current project I need to export dwg files to dxf for site engineers to set out from.
