Cannot load library DwgTrans.dll during opening of .idw in Inventor 2025

[Majjek]

I've just installed Inventor 2025 on a development station to prepare our migration from 2023 to 2025.

When I open a drawing (in this case the template, to migrate it) I get the error below.

'Cannot load library C:\Program Files\Autodesk\Inventor 2025\Bin\DwgTrans.dll'

The file does exist on my drive.

When I try to save a drawing file, Inventor crashes and this happens everytime.

I can open and save parts and assemblies without issues.

The error below also popped up when I was updating styles via the Style Library Manager.

Since this .dll seems to be used by the .dwg and .dxf translator, I also tried loading it manually via the Add-Ins screen.

But that doesn't work either, but Inventor doesn't crash though.

I already re-installed Inventor 2025 and updated it to the latest update version.

I also tried using that file from Inventor 2023, but that also doesn't work.

There's still an Inventor 2023 version on this station as well, but that shouldn't matter in my opinion.

Before this, I had 2021 and 2023 installed together and that didn't give an issue.

[johnsonshiue]

Hi! This could be an access privilege issue. Please take a look at the following article.

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Cannot-load-librar...

Many thanks!

[Majjek]

Hi Johnson, thanks for your reply.

I've removed everything Autodesk related from the station, following the Autodesk guides.

I've installed Inventor 2025 only from a new download, and still get the same message.

I've also tried a different user which has never logged in to that station before, but still the same result.

The file isn't missing, so that means I've tried all options.

Only the antivirus/security setting I didn't try, but that's on the same line as try with a different user.

Any other advice?

[Majjek]

I've also installed it on another machine, with the same results..

Inventor Read Only doesn't work either.

[johnsonshiue]

Hi! Something seems seriously wrong on your machine. Maybe the .Net Core is corrupted. Try uninstalling .Net Core also. Then run Inventor install. Please make sure all critical Windows updates are installed the the graphics driver is updated.

Many thanks!