#ACADR12
Chris,
>> .dxb file in autocad release 12.
You'll get more response in the ACAD forum, but the quick answer in R12 is to
Config -> Configure plotter -> Add a plotter -> Pre ADI 4.1 file formats -> DXB
file. Then, in AutoCAD, get the drawing you want, select Plot, and choose the
file format you just selected, and you'll get a .dxb file.
John