Cannot debug .NET Framework 4.7.2 unit test from "Debug Test" code lens in VSCode

Issue Description

When I click on the “Debug Test” code lens above my NUnit tests, I get the following error popup in the corner of VSCode:

Error processing ‘configurationDone’ request. Unknown Error: 0x80131c30

I can debug my code just fine from the VSCode debug menu, breakpoints are hit. I’m also able to debug tests form the “Debug Test” code lens in other projects that are .NET Core. Appears to be only a .NET Framework error.

This error happens when running VSCode as Administrator and as a normal user (tested both.) I tried disabling all other extensions and only using the ms-dotnettools.csharp extension, but I’m getting the same error.

Steps to Reproduce

1. Create a .NET Framework 4.7.2 test project:

   <Project Sdk="Microsoft.NET.Sdk">
   
       <PropertyGroup>
   	    <TargetFramework>net472</TargetFramework>
   	    <Platform>x64</Platform>    
   	    <IsPackable>false</IsPackable>
       </PropertyGroup>
   
       <ItemGroup>
   	    <PackageReference Include="NUnit" Version="3.12.0" />
   	    <PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
   	    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
       </ItemGroup>
   
   </Project>
   

   using NUnit.Framework;
   
   namespace tests
   {
       [TestFixture]
       public class Tests
       {
   	    [Test]
   	    public void Test1()
   	    {
   		    Assert.That(true, Is.EqualTo(true));
   	    }
       }
   }
   

2. Create a .vscode\settings.json with the following setting:

   {
       "csharp.unitTestDebuggingOptions": {
   	    "type": "clr"
       }
   }
   

3. Set a breakpoint in the test and click the “Debug Test” code lens above the test function.

Expected Behavior

Test runs and breakpoint is hit.

Actual Behavior

Debugging appears to start, but then stops and gives this error: > Error processing ‘configurationDone’ request. Unknown Error: 0x80131c30

Logs

OmniSharp log

[info]: OmniSharp.DotNetTest.VSTestManager read: {"MessageType":"TestSession.Connected","Payload":null}
[info]: OmniSharp.DotNetTest.VSTestManager read: {"MessageType":"ProtocolVersion","Payload":1}
[info]: OmniSharp.DotNetTest.DebugSessionManager Debug session started.
[info]: OmniSharp.DotNetTest.DebugSessionManager Debug session ended.

C# log

none

Environment information

VSCode version: 1.52.1 C# Extension: 1.23.8

Dotnet Information

.NET SDK (reflecting any global.json): Version: 5.0.100 Commit: 5044b93829

Runtime Environment: OS Name: Windows OS Version: 10.0.18363 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\5.0.100\

Host (useful for support): Version: 5.0.0 Commit: cf258a14b7

.NET SDKs installed: 2.1.202 [C:\Program Files\dotnet\sdk] 2.1.300 [C:\Program Files\dotnet\sdk] 2.1.301 [C:\Program Files\dotnet\sdk] 2.1.403 [C:\Program Files\dotnet\sdk] 2.1.801 [C:\Program Files\dotnet\sdk] 2.2.207 [C:\Program Files\dotnet\sdk] 3.1.300 [C:\Program Files\dotnet\sdk] 3.1.301 [C:\Program Files\dotnet\sdk] 5.0.100 [C:\Program Files\dotnet\sdk]

.NET runtimes installed: Microsoft.AspNetCore.All 2.1.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.1 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.23 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.1 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.23 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.23 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET runtimes or SDKs: https://aka.ms/dotnet-download

Visual Studio Code Extensions

Extension	Author	Version
auto-using	Fudge	0.7.15
Bookmarks	alefragnani	12.1.4
bracket-pair-colorizer	CoenraadS	1.0.61
cake-vscode	cake-build	1.0.0
code-spell-checker	streetsidesoftware	1.10.2
csharp	ms-dotnettools	1.23.8
debugger-for-chrome	msjsdiag	4.12.11
docker-explorer	formulahendry	0.1.7
docomment	k–kato	0.1.20
EditorConfig	EditorConfig	0.16.4
gitlens	eamodio	11.1.3
jupyter	ms-toolsai	2020.12.414227025
markdown-pdf	yzane	1.4.4
ng-template	Angular	11.1.0
npm-intellisense	christian-kohler	1.3.1
openapi-lint	mermade	1.2.0
plantuml	jebbs	2.14.1
plantuml	jkeys089	1.8.1
python	ms-python	2021.1.502429796
python	tht13	0.2.3
remote-containers	ms-vscode-remote	0.155.1
remote-ssh	ms-vscode-remote	0.62.0
remote-ssh-edit	ms-vscode-remote	0.62.0
remote-ssh-explorer	ms-vscode-remote	0.56.0
remote-wsl	ms-vscode-remote	0.52.0
rust	rust-lang	0.7.8
stylelint	shinnn	0.51.0
swagger-viewer	Arjun	3.0.1
vscode-custom-css	be5invis	4.0.1
vscode-docker	ms-azuretools	1.9.1
vscode-icons	vscode-icons-team	11.1.0
vscode-markdownlint	DavidAnson	0.38.0
vscode-npm-script	eg2	0.3.13
vscode-remote-extensionpack	ms-vscode-remote	0.20.0
vscode-test-explorer	hbenl	2.19.5
vscode-todo-highlight	wayou	1.0.4
vscode-typescript-tslint-plugin	ms-vscode	1.3.3
vscode-xml	redhat	0.14.0
vscode-yaml	redhat	0.14.0

[gregg-miskelly]

@RLPHRE I updated https://github.com/OmniSharp/omnisharp-vscode/wiki/Desktop-.NET-Framework and https://github.com/OmniSharp/omnisharp-vscode/wiki/How-to-run-and-debug-unit-tests with better information. If there are other spots you think the documentation should be updated, let me know. I also fixed the debugger to put up a better error message when it is asked to launch an x86 .NET Framework program.

[Toucan4Life]

After multiple weeks encountering this issue, I found a working solution.

Fix : Create a “My_Project.runsettings” file specifying “<TargetPlatform>x64</TargetPlatform>” and refer to it in the settings.json of you solution with “omnisharp.testRunSettings”:“Path_To_My_File\My_Project.runsettings”

Explanation : The “0x80131c30” signify that the debugger and the debuggee doesn’t target the same platform. (https://www.hresult.info/FACILITY_URT/0x80131C30)

In my case my project was targeting x64 and the debugger was launching with x86 (this can be seen using trace log on omnisharp, and you’ll see it is using testhost.net47.x86.exe).

In my case I needed to specify to launch the debugger in x64. In Visual Studio, this can be done thanks to the property “TargetPlatform” of the runSettings file (https://docs.microsoft.com/en-us/visualstudio/test/configure-unit-tests-by-using-a-dot-runsettings-file?view=vs-2019#the-runsettings-file).

Fortunately, we can specify in omnisharp the runSettings file thanks to #3573. Unfortunately, this option was not made visible through intellisense (#3916).

Don’t know why using .Net Core projects I didn’t had the issue.

Hope this helps !