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I am a student learning to use Unity for HoloLens 2 Development. I am working through the guide in link 1. I am trying to get the Mixed Reality Feature Tool working, but it will not open. The process appears in task manager and draws memory, but it will not open as a window.

My system summary is:

Processor Intel(R) Core(TM) i7 CPU Q 720 @ 1.60GHz 1.60 GHz Installed RAM 6.00 GB System type 64-bit operating system, x64-based processor

I have windows 10 Pro and my OS build is 19043.1706

The program logs says:

"Mixed Reality Feature Tool 1.0.2206.1 [6/11/2022 4:26:48 PM] Refreshing the Primary catalog. [6/11/2022 4:26:48 PM] Reading Primary feed [6/11/2022 4:26:50 PM] Reading version information for com.microsoft.altspacevr_uploader [6/11/2022 4:26:50 PM] Reading additional information for com.microsoft.altspacevr_uploader"

Any idea why it won't work?

Hemalurgical_Potato
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    I cannot see the hyperlink you attached. Do you download the tool from https://www.microsoft.com/en-us/download/details.aspx?id=102778 ? While .Net 5.0 Runtime is also required for this app. Please find the installer on https://dotnet.microsoft.com/en-us/download/dotnet/5.0 – Seth DU - MSFT Jun 13 '22 at 08:45
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    Okay, I moved computer and it works so, meh. IDK what was wrong. – Hemalurgical_Potato Jun 17 '22 at 19:28
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    When I double-click on `MixedRealityFeatureTool.exe` file to launch the `Mixed Reality Feature Tool`, I get `To run this application, you must install .NET` but I already have `.NET 6.0.300` installed. I understand from this [link](https://learn.microsoft.com/en-us/windows/mixed-reality/develop/unity/welcome-to-mr-feature-tool) that I need `.NET 5.0 runtime` but when I go to the download page, it explicitly says `This release has reached end of life, meaning it is no longer supported. We recommend moving to a supported release, such as 6.0 Runtime`. Do I really need .NET5 then? – Muhy Jun 21 '22 at 09:17
  • Yeah, it has to be 5.0 – Hemalurgical_Potato Jun 24 '22 at 16:28

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