topic Re: Civil 3D 2025 to 2026 Update in Civil 3D Customization Forum

Civil 3D 2025 to 2026 Update

Domzinator — Tue, 27 Jan 2026 13:39:17 GMT

Hi all, we are moving over to Civil 3D 2026 and i am having issues getting the Plugin to load now in Civil 3D 2026.

I have Deleted all my Plugin References to 2025 and reimported the 2026 References and have also changed this:

i have also tried R25.1 at both and still doesnt want to load .Dll's.

Am i missing something for 2026?

Re: Civil 3D 2025 to 2026 Update

hippe013 — Tue, 27 Jan 2026 15:20:11 GMT

Is your Target Framework set to .NET 8.0?

Re: Civil 3D 2025 to 2026 Update

Jeff_M — Tue, 27 Jan 2026 17:52:12 GMT

Where is your .bundle located? If you have it in the ProgramData folder, AutoCAD 2026+ will no longer load from there. I relocated my bundles to here: C:\Program Files (x86)\Autodesk\ApplicationPlugins

They may also be placed here: C:\Users\<USERNAME>\AppData\Roaming\Autodesk\ApplicationPlugins

Re: Civil 3D 2025 to 2026 Update

michal_hcz — Tue, 03 Feb 2026 18:45:32 GMT

But as Jeff mentioned. Since Civil 2026 there has been an important change with plugin automatic loading.
In 2025- it works from path c:\ProgramData\Autodesk\ApplicationPlugins\

But in 2026+ plugins have to be inside c:\Users\user\AppData\Roaming\Autodesk\ApplicationPlugins\ or even better in c:\Program Files\Autodesk\ApplicationPlugins\

There is also a way to use the old ApplicationPlugins folder but u have to change something in windows registers...

Re: Civil 3D 2025 to 2026 Update

Domzinator — Sun, 08 Feb 2026 13:19:16 GMT

Thanks this solved it, i want aware it was moved thanks