topic Betreff: only 1 drawing per autocad sestion in AutoCAD Forum

only 1 drawing per autocad sestion

marc_vandergroep9XQVM — Wed, 25 Feb 2026 05:50:59 GMT

Hello and good morning,

Im working with M-files and autocad 2024.

When i open a autocad, im getting the screen with the recent opened files.
When i'm going to m-files or go to my local drive and i double click on a DWG file, autocad opens an news session. so i have 2 times autocad running.
When i double click another DWG file another session opens.

When i open the first autocad session and than drag de second file in the tab line beside the fist drawing it works without any problem.

I already tried SDI but this is "0"

anyone an idea?

IT of Sunoco is blaming the last update of autocad but i think this is bs 😉

Betreff: only 1 drawing per autocad sestion

cadffm — Wed, 25 Feb 2026 06:27:36 GMT

Hi,

file doubleclick action is controled by windows, I guess the .dwg (dxf/dwt) file extension is not linked to AcLauncher.exe.

AcLauncher.exe decide to open which program and instance should be use.

https://help.autodesk.com/view/ACD/2024/ENU/?caas=caas/sfdcarticles/sfdcarticles/Double-clicking-a-DWG-file-opens-a-new-instance-of-AutoCAD.html

Re: only 1 drawing per autocad sestion

pendean — Wed, 25 Feb 2026 14:35:26 GMT

@marc_vandergroep9XQVM wrote:
Im working with M-files and autocad 2024.

Unload M-Files, problem should go away.

Need M-Files? You'll have to go ask them for help.

Re: only 1 drawing per autocad sestion

BhaskarMurari — Wed, 25 Feb 2026 17:03:26 GMT

Try this method:

Delete registry keys for current file association.

Exit AutoCAD.
Press WINDOWS-R on the keyboard to bring up the Run window, enter REGEDIT, and click OK.
Delete these Registry keys:
HKEY_CLASSES_ROOT\.dwg
Reboot the computer.
Associate a DWG file with AcLauncher.exe see DWG file type associativity in Windows😞
C:\Program Files\Common Files\Autodesk Shared\AcShellEx\AcLauncher.exe

This should address the kind of issues.

Re: only 1 drawing per autocad sestion

marc_vandergroep9XQVM — Mon, 09 Mar 2026 10:45:10 GMT

Thank you but m-files is were we "keep" al documents.
I need to open m-files to get to my drawings 😉

Kind regards
Marc

Betreff: only 1 drawing per autocad sestion

marc_vandergroep9XQVM — Mon, 09 Mar 2026 10:47:56 GMT

The IT guy of Sunoco had done this already but he was also unsuccesfull, he is blaming autocad updates.

Thanks for the help
Kind regards

marc

Re: only 1 drawing per autocad sestion

marc_vandergroep9XQVM — Mon, 09 Mar 2026 10:49:40 GMT

I will copy your option to our IT guy from sunoco, see if its something it will work.

Kind regards and thanks for the help
Marc

Re: only 1 drawing per autocad sestion

lauri_barnhart — Thu, 12 Mar 2026 15:19:48 GMT

Hi @marc_vandergroep9XQVM,

I wanted to check in and see if you still needed assistance, or if you found a solution to your question already? Let us know if you need further assistance by providing an update or if you have found a solution, please share it with the community so other members who may have the same question could learn from your experience.

All the best,

Lauri | Community Manager