Cannot launch preview builds — silent failure

I uninstalled the older versions and cleanedup the old installation folders via Gamma Launcher.

Then after installing the latest preview - 7.0-369 - I am not able to launch it!
Also tested with:
7.0-369
7.0-366
7.0-365
7.0-364
7.0-363
and no luck!

@Elias mentioned on element that it might be related to a dotnet x86 installation.
Running a dotnet --info does not show any x86 architecture!

Any hints?

Yo,

Does the Windows Event Log give you something when it fails to launch? Do you get anything relevant if you launch vvvv.exe with --log and check the generated log file?

Jo,

Nope! I guess it crashes even before that!

@joreg

here is teh dotnet --info

Summary

C:\Users\ping>dotnet --info
.NET SDK:
Version: 9.0.301
Commit: a596cd22e2
Workload version: 9.0.300-manifests.9bcbba73
MSBuild version: 17.14.5+edd3bbf37

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26100
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\9.0.301\

.NET workloads installed:
There are no installed workloads to display.
Configured to use loose manifests when installing new manifests.

Host:
Version: 9.0.6
Architecture: x64
Commit: 3875b54e7b

.NET SDKs installed:
8.0.201 [C:\Program Files\dotnet\sdk]
8.0.300 [C:\Program Files\dotnet\sdk]
8.0.401 [C:\Program Files\dotnet\sdk]
9.0.301 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 8.0.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.16 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.27 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.27 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.8 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.12 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
None

Environment variables:
Not set

global.json file:
Not found

Learn more:
dotnet command - .NET CLI | Microsoft Learn

Download .NET:
https://aka.ms/dotnet/download

Did you try uninstalling .NET 9 and re-install .NET 8 SDK?

Also didn’t help… Strange!

had a chance to remote into that PC and found this “Catastrophic failure” reported by the Windows App Runtime:

what fixed the issue is uninstalling the Windows App Runtime entries:

then simply reinstalling vvvv, which installs the correct Windows App Runtime again.

so unfortunately still unclear what caused the apparent breaking of the Windows App Runtime, but in case someone stumbles up this, the above should help.

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