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I am trying to get started with a brand new .NET Maui application. Upon creating the project, it has a single project for the MauiApp, and another project named MauiApp.WinUI. When I try to run the the app on my Windows 10 device, I get the error: "The project doesn't know hot to run the profile MauiApp.WinUI". I am not sure what to do in order to fix this. Any suggestions?

Mampinator
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  • which exact version of vs you are using? – Cfun Jun 19 '21 at 20:00
  • I used Visual Studio Community 2019 Preview (16.11.0 Preview 2.0) to get the Maui templates to appear. That is the version I used when this issue occurred as well. – Mampinator Jun 19 '21 at 20:04

5 Answers5

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As of 7/14/21, you should use the Single-project MSIX Packaging Tools for VS 2022, not the one for VS 2019.

Shidouuu
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In my case installing Single-project MSIX Packaging Tools solved the problem.

Just in case, I already had Project Reunion (Preview) installed.

Iman Sobhaniyan
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  • it works for me too, but why we need these extensions? – Happy Developer Jun 27 '21 at 10:02
  • Welcome to Stack Overflow. I moved the links inline to aid in readability. Please review the markup so you can add links to your answers in the future. – Jeremy Caney Jul 02 '21 at 01:23
  • Also, I used the same URLs you had defined, but the first URL doesn't actually point to a tutorial, but simply references the _Single-project MSIX Packaging Tools_ referenced by the second link. Can you correct that URL? – Jeremy Caney Jul 02 '21 at 01:23
  • I have updated the link of "Single-project MSIX Packaging Tools for VS 2022 preview" package. – Chinmay T Dec 15 '21 at 19:51
  • @ChinmayT - the question is tagged [tag:visual-studio-2019] though. Better to add the link rather than replace it -- but it's already there anyway in [this answer](https://stackoverflow.com/a/69782249/3744182) of [Shidouuu](https://stackoverflow.com/users/14555957/shidouuu). – dbc Dec 19 '21 at 01:29
4

I was under the impression after watching a few of the community hangouts that all you needed to do was run the maui-check tool.

It appears that there are other dependencies beyond the tools capabilites, or that it doesn't check, which is a little annoying. But are listeed in the installation docs.

Single-project MSIX Packaging Tools

Project Reunion (Preview)

After installing these everything worked fine.

user520100
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From VS 2022 preview : I just deleted the file launchSettings.json and the app launched !

Poppyto
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I installed Single-project MSIX Packaging Tools extension and Project Reunion extension (preview for VS2022). But this was not enough, I still could not start the app.

Then I installed MSIX Packaging tool from MS Store, and it finally worked.

Here's my launchSettings.json file:,

"profiles": {
    "TestWinUI": {
      "commandName": "MsixPackage"
    }
  }
Pavel Voronin
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