TS2025 Q2 Not finding .NET System.dll

[KevRotork]

Hi, 

I have created a simple LabVIEW Project.

Test 1 - Fault.vi 

Test 2 - Blank

Is just an empty VI

I am creating a Packed Library

I am then planning to call this in TestStand using a LabVIEW Action Step, I am getting the following error

I am using TS 2025 Q2 and LV 2025 Q1 Win 11

This was working on my previous setup of LV 2023 Q1 TS 2022 Q4 

Looking at the Log located here: C:\Users\<USERNAME>\AppData\Local\Temp\TestStand

Its suggesting the VI is broken.

But it isn't. Even if I call the ppl from another LabVIEW project the VI is fine.

Only when called in TestStand

Please help - What am I missing

[Oli_Wachno]

This may be related to the changes in the .net  adapter

[KevRotork · Accepted solution]

After speaking with NI Technical support I have a solution.

 Please follow the steps below;

Locate is found at 
C:\Program Files\National Instruments\TestStand 2025\Bin\SeqEdit.ini.

The specific path may vary depending on whether you are using the 32-bit or 64-bit version of TestStand. Within this file, there is a configuration setting referred to as "DisableDotNetFrameworkSupport." By default, this setting is enabled, meaning it is set to True. However, if you change the value of this token to False, you will find that the issue you are encountering is resolved. Adjusting this setting can help improve compatibility with certain .NET framework features in TestStand.

Note: It will not allow you to edit the file. Copy the file to the Desktop, change the value to False, remove the file from the specified location, and replace it with the new one.

[Oli_Wachno]

Thanks for sharing!

[KevRotork]

No worries, thanks for your initial reply. Hopefully this will help others out.