Debug launch fails on Windows with error 0x800700c1 if a file named `dotnet` is present

Environment data

dotnet --info output: .NET SDK (reflecting any global.json): Version: 6.0.100
Commit: 9e8b04bbff

Runtime Environment:
OS Name: Windows
OS Version: 10.0.19043 OS Platform: Windows
RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\6.0.100\

Host (useful for support): Version: 6.0.0 Commit: 4822e3c3aa

.NET SDKs installed: 6.0.100 [C:\Program Files\dotnet\sdk]

.NET runtimes installed: Microsoft.AspNetCore.App 6.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 6.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 6.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

VS Code version: C# Extension version: v1.24.0

OmniSharp log

Starting OmniSharp server at 2/28/2022, 12:04:05 PM Target: c:\Users\Anjan Reddy\source\repos\rsi-core\Rsi.sln

OmniSharp server started with .NET 6.0.100 . Path: c:\Users\Anjan Reddy.vscode\extensions\ms-dotnettools.csharp-1.24.0.omnisharp\1.38.0-net6.0\OmniSharp.dll PID: 3004

    Starting OmniSharp on Windows 10.0.19043.0 (x64)

    Checking the 'DOTNET_ROOT' environment variable to find a .NET SDK

    Using the 'dotnet' on the PATH.

    DotNetPath set to dotnet

    Located 1 MSBuild instance(s)
        1: .NET Core SDK 6.0.100 17.0.0 - "C:\Program Files\dotnet\sdk\6.0.100\"

    Registered MSBuild instance: .NET Core SDK 6.0.100 17.0.0 - "C:\Program Files\dotnet\sdk\6.0.100\"

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.Completion.CompletionOptionsProvider, Order: 0

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.RenameWorkspaceOptionsProvider, Order: 100

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.ImplementTypeWorkspaceOptionsProvider, Order: 110

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.BlockStructureWorkspaceOptionsProvider, Order: 140

    Detecting projects in 'c:\Users\Anjan Reddy\source\repos\rsi-core\Rsi.sln'.

    Queue project update for 'c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.Api\Rsi.Api.csproj'

    Queue project update for 'c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.Core\Rsi.Core.csproj'

    Queue project update for 'c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.DataAccess.EFCore\Rsi.DataAccess.EFCore.csproj'

    Queue project update for 'c:\Users\Anjan Reddy\source\repos\rsi-core\tests\Rsi.Fixtures\Rsi.Fixtures.csproj'

    Queue project update for 'c:\Users\Anjan Reddy\source\repos\rsi-core\tests\Rsi.UnitTests\Rsi.UnitTests.csproj'

    Detecting CSX files in 'c:\Users\Anjan Reddy\source\repos\rsi-core'.

    Did not find any CSX files

    Configuration finished.

    Omnisharp server running using Stdio at location 'c:\Users\Anjan Reddy\source\repos\rsi-core' on host 15080.

    Loading project: c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.Api\Rsi.Api.csproj

    Successfully loaded project file 'c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.Api\Rsi.Api.csproj'.

    Adding project 'c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.Api\Rsi.Api.csproj'

    Loading project: c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.Core\Rsi.Core.csproj

    Successfully loaded project file 'c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.Core\Rsi.Core.csproj'.

    Adding project 'c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.Core\Rsi.Core.csproj'

    Loading project: c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.DataAccess.EFCore\Rsi.DataAccess.EFCore.csproj

    Successfully loaded project file 'c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.DataAccess.EFCore\Rsi.DataAccess.EFCore.csproj'.

    Adding project 'c:\Users\Anjan Reddy\source\repos\rsi-core\src\Rsi.DataAccess.EFCore\Rsi.DataAccess.EFCore.csproj'

    Loading project: c:\Users\Anjan Reddy\source\repos\rsi-core\tests\Rsi.Fixtures\Rsi.Fixtures.csproj

    Successfully loaded project file 'c:\Users\Anjan Reddy\source\repos\rsi-core\tests\Rsi.Fixtures\Rsi.Fixtures.csproj'.

    Adding project 'c:\Users\Anjan Reddy\source\repos\rsi-core\tests\Rsi.Fixtures\Rsi.Fixtures.csproj'

    Loading project: c:\Users\Anjan Reddy\source\repos\rsi-core\tests\Rsi.UnitTests\Rsi.UnitTests.csproj

    Successfully loaded project file 'c:\Users\Anjan Reddy\source\repos\rsi-core\tests\Rsi.UnitTests\Rsi.UnitTests.csproj'.

    Adding project 'c:\Users\Anjan Reddy\source\repos\rsi-core\tests\Rsi.UnitTests\Rsi.UnitTests.csproj'

    Update project: Rsi.Api

    Update project: Rsi.Core

    Update project: Rsi.DataAccess.EFCore

    Update project: Rsi.Fixtures

    Update project: Rsi.UnitTests

Received response for /v2/getcodeactions but could not find request.

Steps to reproduce

1. Navigate to “Run and Debug” in Visual Studio Code
2. Add a launch.json that comes by default with Visual Studio Code
3. Hit F5 or Start Debugging by pressing the Green Arrow.
4. You will see that the project will start building, but will error out without starting the Debugger - Error processing ‘configurationDone’ request. Unknown Error: 0x800700c1

Expected behavior

Debugger should start and one should be able to setup break points and debug an application

Actual behavior

Error processing ‘configurationDone’ request. Unknown Error: 0x800700c1

[gregg-miskelly]

Cool. I enhanced our error handling, and, on Windows, fixed the code to just look for dotnet.exe instead of dotnet.

[gregg-miskelly]

I am not aware of anything in .NET Tooling that will create that file.