Debugging woes: "This document is opened by another project"

I've set up the incremental compiler (as per https://forum.unity.com/threads/unity-incremental-c-compiler.523993/) in order to use C# 7 features, but for some reason I cannot debug anything. When I "attach to unity and play", the code runs, but all my breakpoints disappear. If I try to set a breakpoint while debugging, I get a popup message saying "This document is opened by another project", and upon clicking "OK" a few times I sometimes (but not always - doesn't seem to be deterministic) get a "Frame not in module" page.

My build settings are as follows:

• Scripting Runtime Version: .NET 4.x Equivalent
  
• Scripting Backend: Mono
• API Compatibility Level: .NET Standard 2.0 (also tried with .NET 4.x)

Screenshot:


Things I've tried: Cleaning the project, restarting my computer.

Any ideas?

 

I'm getting the same issue. I've tried it in both VS 15.6.7 and VSTU 3.6.0.5 and VS 15.7 Preview 5 and 6 with VSTU 3.7.0.1. I've also tried in both Unity 2018.1.0f2 and 2018.2.0b2 with the same issue. I've also tried different package versions for the incremental compiler and I get the error

Code (csharp):

1. This document is opened by another project

or

Code (csharp):

1. The Incremental Compiler has stopped working.

The second one seems to happen when I use package 0.0.38 and 0.0.39 which gives

Code (csharp):

1. Error "csc.exe" exited with code -532462766. Assembly-CSharp

This may be an issue with VS since I can build and debug in Rider 2018.1

 

Thank you for the quick reply, I have reported the issue. For anyone else who is having the same issue here is the link.

https://developercommunity.visualst...ent-errors-when-trying-to-builddebug-uni.html

 

Hi @pbdot, it's working as expected on my side (VS 15.7, Unity 2018.1.0f2), with a simple project.

- Could you double check that you have .NET targeting packs 4.6 and 4.7.1 installed ?
- Could you share your project with us ? vstusp[at]microsoft[dot]com

Thank you!
Regards
Sebastien Lebreton [MSFT]

 

Yes, both targeting packs are installed. And sure, I'll send it.

 

I have both of those installed. I'm running VS Professional 2017 version 15.6.4 and just installed VSTU 3.6.0.5. The "This document is opened by another project" popup message stopped disappearing, but all breakpoints still fail ("The breakpoint will not currently be hit. Unable to find a corresponding location"). Previously I was running the latest release version of VSTU (i.e. not the [experimental] version).

 

If Visual Studio is unable to find a source location for a specific breakpoint you will see those warnings. Check that the behaviour you are using is properly loaded/used in the current Unity scene. Unity is only loading types effectively used, so if you don't attach/instantiate your behavior, it will never be loaded, so we'll never be able to bind a breakpoint on this type.

Sometimes for advanced constructs (like coroutines), we can still display a warning even if everything is fine (because a compiler-generated type will be loaded on first use). We'll probably remove those warnings in a future version.

Regards
Sebastien Lebreton [MSFT]

 

Sorry, I must have accidently removed the behaviour script from the only gameobject I have. When I reattached it, the "This document is opened by another project" popup message reappeared.

 

Hi,

I tried your project and everything is working as expected on my side.

So going forward, what you could try is the following:
- Upgrade to VS 15.7 (final released today!)
- Remove Library, obj, .vs folder + generated csproj, rsp and sln files in the root folder

Regards
Sebastien Lebreton [MSFT]

 

I did what you suggested, still getting the same error/problem. Also upgraded to 2018.2.0b3 with no improvement.

Edit: I tried changing the incremental compiler version in the manifest.json file to "0.0.38" (from 0.0.30), and now I'm getting the following error: '"csc.exe" exited with code -532462766.'