Unable to Build Project with c# solution (Godot 4.1.1)

[ArtemSin]

Godot version

4.1.1 Stable

System information

Windows 10 - Gotot 4.1.1 Stable

Issue description

Run Game failed if i have c# solution in project with these errors
editor/editor_node.cpp:6468 - An EditorPlugin build callback failed.
Transient parent has another exclusive child
If i delete csproj file it runs well , but cant rebuild ( it will regenerate csproj and have error again)
I'm using Rider with gotot plugin ,MSBuild dotnet 6

Steps to reproduce

Create Empty project
Create c# script
Create c# solution
Run it

Minimal reproduction project

Reproduction Project
Test5 copy.zip

[raulsntos]

Deleting the csproj will make Godot think your project doesn't contain C# code and will not build it.

In the steps to reproduce, you mention creating the solution as one of the steps after creating a script. Godot should automatically create the solution if it doesn't exist when creating a C# script, did that not happen for you?

This error is likely to show up when your C# project does not compile, check the MSBuild panel to see if there were any errors building your project.

Please upload a minimal reproduction project to make this easier to troubleshoot.

[ArtemSin]

@raulsntos yes, you right. If i create с#script - godot will make solution as well. In MSBuild panel there is one error- "The build method threw an exception." Actualy i dont have more info about that. There is reproduction project
Test5 copy.zip

[raulsntos]

You should be able to right-click that error and copy it, it should contain the exception that was thrown. It could be that you don't have the dotnet CLI in the PATH environment variable, can you run the dotnet --info command in a console?

[ArtemSin]

@raulsntos i tried to copy error but it didnt provide more info , only "The build method threw an exception." There is dotnet info comand's result

[ArtemSin]

@raulsntos i see, 4 real environment variables not set, will try to fix this

[raulsntos]

i tried to copy error but it didnt provide more info

That's weird, from what I can see that message should always include the exception in a new line:

godot/modules/mono/editor/GodotTools/GodotTools/Build/BuildManager.cs

Lines 99 to 101 in 4df80b0

	BuildLaunchFailed?.Invoke(buildInfo,
	$"The build method threw an exception.\n{e.GetType().FullName}: {e.Message}");
	Console.Error.WriteLine(e);

Can you see the exception message if you hover the error? Also, since the exception is printed to the console, try opening Godot from a terminal and see the output there.

i see, 4 real environment variables not set, will try to fix this

It seems that you do have dotnet in the PATH, otherwise you wouldn't be able to execute the command, right?

[ArtemSin]

@raulsntos i tried to launch with console too, but there's no second line . I checked and add again dotnet in the PATH ( maybe it already was), also i added DOTNET_ROOT variable too , but there's no effect . Also i asked my friend to share his dotnet --info screen and it looks like mine. Btw i can easily run console/unity projects , so i dont think there is an .net issue , also my friends who stared using Godot dont have such problem ,maybe i need some kind of extra win/godot setup?

[ArtemSin]

@raulsntos in godot i changed verbosity level to detailed , so for now in console i see new exception

[raulsntos]

It seems Godot can't find dotnet in your PATH environment variable. Try executing echo %PATH% in the terminal you are using to open Godot, it should contain the path to the directory that contains the dotnet executable.

[lukiiko]

I'm experiencing the same issue on Ubuntu 22.04 and I just verified that dotnet is in my path. The issue still persists. Also I was building perfectly fine with a C# solution. I seem to have done something however which made it no longer work. Since I just started this project last night, it's very small (like 4 scenes and 3 scripts). If it helped, I could upload it.

[lukiiko]

I have solved the issue on my end. I decided to run dotnet build in my project directory and it gave me a usable error message. It turns out I had a signal declared as private. After fixing that it builds normally again.

[ArtemSin]

@raulsntos yeah, it contains . I have some dotnet instances in diffrent paths , and also in system and user variables for sure. I tried to remove from PATH some other instances and leave just one ( from user documents / program files ) , but there's no result. There is no a way to set the path directly in godot ?

[raulsntos]

In 3.x there are multiple build tools, which one are you using? It should default to dotnet CLI, unless it can't find it.

In both 3.x and 4.x we use the same code to find dotnet in the PATH, so if 3.x is working I'm guessing it's not using the dotnet CLI as build tool. You check the value for this setting: Editor Settings > Mono > Builds > Build Tool.

Your PATH environment variable seems to contain the path to the dotnet CLI, so it should be able to find it. Can you also share the output of echo %PATHEXT%? These are the extensions that will be considered when looking for executables in PATH, I believe the default value should contain .EXE.

[ArtemSin]

@raulsntos so , i was wrong about v3.5 , it can run c# code, but it also give me an error when i press Build button . Build tool is dotnet CLI

[ArtemSin]

@raulsntos alright, i've found temporary solution from this topic ( about same problem on Mac) #38985
If i launch Godot from cmd , it works fine ,both 3.5 and 4.1 , so i can build project and run it without errors. It is wierd , but for now this is only solution for me

[cyraid]

I'm not sure if this will help anyone, but make sure in project.godot:

[dotnet]

project/assembly_name="NameOfSolution"

Make sure NameOfSolution.sln and NameOfSolution.csproj exists.