AutoCAD 2007/2008/2009

AutoCAD 2007/2008/2009

Posts: 20
Registered: ‎07-16-2007
Message 1 of 5 (6,321 Views)

Determining the version of an AutoCAD drawing

6321 Views, 4 Replies
07-24-2007 05:52 AM
I was surfing this morning for something related to AutoCAD and came across this tip that know I will use someday, so I'm documenting it for myself and the other users in our agency to have.

It lets you determine what version of AutoCAD a drawing was created in. Granted, there may be a different method to do this, but this is the only one I've seen so far, so I guess I should save it until I find a better one. Does someone know of a better way?

What I need assistance with is filling in the gaps for the most recent AutoCAD releases. Can anyone assist me with the missing information?

The following text was copied from the web site I've linked to below.

To determine the version of AutoCAD that created a particular DWG or DXF file, open the file as a text editor (save DXF files in ASCII text format first). The first six bytes of a DWG file identify its version. In a DXF file, the AutoCAD version number is specified in the header section. The DXF system variable is $ACADVER. Here are the version identifiers for the various releases. Note that more than one release uses the same identifier when the drawing format remains fully compatible.

AC1021: (This is the code when I opened an AutoCAD 2007 dwg)
AC1018: AutoCAD 2004
AC1015: AutoCAD 2002, 2000i, 2000
AC1014: AutoCAD Release 14 (Release 14 sample
drawings use AC1013)
AC1012: AutoCAD Release 13
AC1009: AutoCAD Releases 12, 11
AC1006: AutoCAD Release 10
AC1004: AutoCAD Release 9
AC1002: AutoCAD Release 2.6
AC1.50: AutoCAD Release 2.05

Do not modify the file in Notepad or you may corrupt the drawing file!

Here's where the tip came from:
*Lon Neufeld
Message 2 of 5 (6,321 Views)

Re: Determining the version of an AutoCAD drawing

07-24-2007 06:06 AM in reply to: Oscar69
An easier way I've found is to install DWG TrueConvert and simply add the
dwgs you want to check versions for. The DWG converter has its other uses
*Dean Saadallah
Message 3 of 5 (6,321 Views)

Re: Determining the version of an AutoCAD drawing

07-24-2007 06:07 AM in reply to: Oscar69
while you wait... and grab acadpvi shell extension if you just want to
know the dwg format and not the exact AutoCAD release.

Dean Saadallah
Add-on products for LT
Posts: 20
Registered: ‎07-16-2007
Message 4 of 5 (6,321 Views)

Re: Determining the version of an AutoCAD drawing

07-24-2007 06:29 AM in reply to: Oscar69
Unfortunately, my hands are tied when it comes to installing any kind of add-on, .exe, etc. on my PC here at work. I work for the federal government and it is ultra-strict here when it comes to software. Any software that is on my PC (including Autodesk products) must undergo a rigorous evaluation to determine if it will pose any threat to our systems, network, other apps, etc. They won't do it for just any ol' app I'd like to have on my PC.
*Lon Neufeld
Message 5 of 5 (6,321 Views)

Re: Determining the version of an AutoCAD drawing

07-24-2007 07:20 AM in reply to: Oscar69
Also, take a look at you can copy a .dll file
into your system then turn on the "title" column in Windows
explorer...however it sounds like your IT dept will not go for this

But after looking at your original question again, you just want to know
what information is missing from your list?

What missing information are you referring to? You are not missing any,
your list is current and up to date. The latest DWG file version is AC1021
(AutoCAD 2007, 2008 and possible 2009 when it is released next year). The
reason you do not see a listing for AC1020 or AC1019 is because these values
refer to the software version (i.e. AutoCAD 2006 and AutoCAD 2005
respectively) which all use the same version of DWG (AC1018).
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