Unable to connect to the Autodesk Vault using VDF with third party CAD application.

[pranit_awale]

I’m trying to log in to Autodesk Vault using the VDF (C# .NET API).
I created an API-Onboarding-ConsoleApplication (template provided by Autodesk), and it works fine there.

However, when I implement the same login logic inside another CAD application’s API, I encounter an exception during the login process.

Has anyone faced this issue before or knows the correct way to handle Vault login in such scenarios? Any guidance would be appreciated.

[Markus.Koechl]

A console application uses the .NET Framework API. CAD applications 2025 are based on .NET Core; therefore, your implementation needs to reference the .NET Core libraries. Find details in this Blog post: Autodesk Vault 2025 SDK - Breaking News - Design & Manufacturing.

[pranit_awale]

I'm not using AutoCAD and Inventor. Then how to integrate it, I'm not getting any way to do so?

[Markus.Koechl · Accepted solution]

@pranit_awale: It sounds like your application is missing library references or output files that are available in the console application template but not in your standalone application. Besides the template, I suggest reviewing the sample application, which implements all available login methods with full source code access: koechlm/API-Onboarding-Sample--Vault-Logins.