How can you tell what version of AutoCAD a file is from?

Hello all,

Seems there's no good resource for MDT customization so I'll post my
question here (and everywhere else I can find).

How can you tell if a DWG is a MDT file, a Mechanical file or just a plain
AutoCAD vanilla file? The ADN told me to look for unique libraries in the
file but I don't buy it...the Autodesk Batch Drawing Converter can identify
any file I throw at it so I know there's a quick and easy method.

Any ideas?

Jim Dowthwaite

Please reply to if possible

 

Try examining the first half-dozen bytes or so in the drawing. For example, opening an AutoCAD 2002 drawing in a hex editor I can see "AC1015".

Regards

Wayne Ivory
IT Analyst Programmer
Wespine Industries Pty Ltd

 

Well, I've never had to worry about that.
Just taking a quick look at the file header I see a difference in byte 11
from plain AutoCAD to the verticals.
This might be a subversion indicator or something like it.
For example, all plain 2002 files have a 0D value in byte 11, but ADT 3
files have a 0B value
But of course, I'm just making a very wild guess here.