Extension not loading in vault 2025

[tinuthomasGE9RJ]

Hello team,

 I tried to load my custom IExplorerExtension to vault 2025 using the SDK. But the extension is not loading. I Used .NET Framework 4.8.  Vcet.config file:
<configuration>
<connectivity.ExtensionSettings3>
<extension
interface="Autodesk.Connectivity.Explorer.Extensibility.IExplorerExtension, Autodesk.Connectivity.Explorer.Extensibility, Version=30.0.0.0, Culture=neutral, PublicKeyToken=215b0879a7566597"
type="MyNameSpace.MyClassName, MYAssemblyName">
</extension>
</connectivity.ExtensionSettings3>
</configuration>

given :

1. AssemblyCompany 
2. AssemblyProduct  
3. AssemblyDescription 
4. ExtensionId 
5. ApiVersion("18.0")

I Used IExplorerExtention, no response or not created any advanced toolbar/tools.

Then I tried SDK samples, That working fine. When I copy the same sample outside c drive it won't work. Could any one help me on this??

[Jaapflonk1]

I have this issue too. We upgraded to Vault 2025 and now our extensions don't work anymore.

Did you find a solution?

[marcelo.zatteraBGGNH]

Hi!

I think you need to migrate to .NET Core as explained in this topic.

Port .Net Framework-based project to .Net 

[Markus.Koechl]

Vault Client 2025 extensions must continue using the .NET Framework! Only 2025 CAD plug-ins must migrate to .NET Core. Event handlers are expected to handle CAD plug-in triggered events, and Vault Client triggered events must be compiled and installed twice: a .NET Framework version and a .NET Core version. See my blog article:  Autodesk Vault 2025 SDK - Breaking News - Under the Hood - All things PDM and PLM.

[mslosar]

Was this ever resolved? I'm having the same issue.  I started a new class library, set everything per the SDK help file and the HelloWorld example, but it simply does not load. There's no indication of why it isn't loading either. No errors, just does nothing.

[tinuthomasGE9RJ]

Please check and confirm the generated .dll and the .vcet file is unblocked. 

[balachandar_vVF4MG]

was this resolved ? if yes , how?

[FRFR1426 · Accepted solution]

Link to the blog article is broken. Here is the updated one: https://www.autodesk.com/blogs/design-and-manufacturing/2024/04/23/autodesk-vault-2025-sdk-breaking-...

[prudhvi_galiFSSED]

Thank you!

This solved the problem for me. I created the extension, so it was working perfectly fine. But when I shared it with my colleagues, it did not load in Vault since the files were blocked on their PCs. They had to manually unblock using the File Properties.