Core: cannot run "dotnet new console"

[MrPaul3]

Problem encountered on https://dotnet.microsoft.com/learn/dotnet/hello-world-tutorial/create
Operating System: windows

Provide details about the problem you're experiencing. Include your operating system version, exact error message, code sample, and anything else that is relevant.

C:\Users\Rick\Documents\VSCodeNetCoreTest> dotnet new console -o myApp
It was not possible to find any installed .NET Core SDKs
Did you mean to run .NET Core SDK commands? Install a .NET Core SDK from:
https://aka.ms/dotnet-download

THIS IS THE ERROR . I HAVE ALREADY INSTALLED .NET CORE SDK COMMANDS BUT THEY ARE STILL SHOWING

[TobiasNils]

Got the same Problem in toolbox on Linux Fedora Workstation 32 after installing dotnet-sdk-3.1 without errors.
__Solved__ it by:

1. Looking up the directory the packages _should_ be installed in using dotnet --info:
   _Output excerpt_:
   .NET Core runtimes installed: Microsoft.AspNetCore.App 3.1.3 [/usr/lib64/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.NETCore.App 3.1.3 [/usr/lib64/dotnet/shared/Microsoft.NETCore.App]
   Note that the other packages are in /usr/lib64/dotnet/shared/
2. Download the corresponding sdk-versions archive from https://aka.ms/dotnet-download as suggested by the error, extract the archive and find a folder sdkalongside shared
3. Copy the content of thesdk-folder to respective /path/to/dotnet/sdk

After that, dotnet --info looks like
```.NET Core SDK (reflecting any global.json):
Version: 3.1.201
Commit: b1768b4ae7

Runtime Environment:
OS Name: fedora
OS Version: 32
OS Platform: Linux
RID: fedora.32-x64
Base Path: /usr/lib64/dotnet/sdk/3.1.201/

Host (useful for support):
Version: 3.1.3
Commit: 4a9f85e9f8

.NET Core SDKs installed:
3.1.201 [/usr/lib64/dotnet/sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.App 3.1.3 [/usr/lib64/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.3 [/usr/lib64/dotnet/shared/Microsoft.NETCore.App]

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

[omajid]

@TobiasNils something funny is going on here.

Got the same Problem in toolbox on Linux Fedora Workstation 32 after installing dotnet-sdk-3.1 without errors.

Did you install from the Microsoft repository? Fedora 32 includes .NET Core 3.1 in the main Fedora repositories. Installing dotnet-sdk-3.1 using just the plain Fedora repositories should get you everything you need.

Note that the other packages are in /usr/lib64/dotnet/shared/

So that's the Fedora package. It installs to /usr/lib64/dotnet.

Download the corresponding sdk-versions archive from https://aka.ms/dotnet-download as suggested by the error, extract the archive and find a folder sdk alongside shared

That installs the bits built by Microsoft next to the bits built by Fedora. The two things are built differently. They may use different (native) compiler settings. They may be using slightly different verisons of runtime packages. This is something that no one really tests and might blow up at any moment.

I would suggest using either the Microsoft packages for .NET Core, or the Fedora packages for .NET Core. Mixing them is probably not a safe thing to do.

[TobiasNils]

Good point, thanks for that. I had been following this guide. Installed the microsoft repo and then effectively with installing dotnet-sdk-3.1 I got "everything" but the sdk (also, no templates).

I just setup a new toolbox and went right to installing dotnet-sdk-3.1 and everything works :)
Thanks again!

[mairaw]

@MrPaul3 can you please paste the output of dotnet --info? I'm wondering if you just installed the runtime but not the SDK.

[TobiasNils]

I just setup a new toolbox and went right to installing dotnet-sdk-3.1 and everything works :)
Thanks again!

EDIT: I don't know if this is the right place anymore, but in the toolbox container, dotnet run throws this error:

/usr/lib64/dotnet/sdk/3.1.103/NuGet.targets(123,5): error : '32 (Container Image)' is not a valid version string. (Parameter 'value') [/home/nils/WorkSpace/myApp/myApp.csproj]

In the normal fedora shell, after installing from the fedora repositories, the whole tutorial works.

[dagood]

@TobiasNils you might be hitting https://github.com/dotnet/core/issues/3909. MSBuild passes all env vars in as MSBuild properties, and NuGet doesn't take kindly to a version prop being set.

[omajid]

We have hit this in Fedora before too: https://pagure.io/dotnet-sig/dotnet-3-0/issue/9. Please feel free to describe how reading in all env vars (including VERSION) and initializing msbuild properties with them is a bad idea at https://github.com/microsoft/msbuild/issues/2713

[TobiasNils]

It was indeed the VERSION=32 (Container Image) env var set in toolbox, where I had installed the the microsoft repo. Deleting the toolbox and setting up a new one did not clean this up.
unset VERSION inside the (new) toolbox did.
Thanks so much!

[zdavidlnx]

Same problem here, just after update to Fedora 32.
With Fedora 30/31 I installed MS packages and all works perfect, after upgrade to F32 stop working.
dotnet --info output is:

_It was not possible to find any installed .NET Core SDKs
Did you mean to run .NET Core SDK commands? Install a .NET Core SDK from:
https://aka.ms/dotnet-download

Host (useful for support):
Version: 3.1.3
Commit: 4a9f85e9f8

.NET Core SDKs installed:
No SDKs were found.

.NET Core runtimes installed:
Microsoft.AspNetCore.App 3.1.3 [/usr/lib64/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.3 [/usr/lib64/dotnet/shared/Microsoft.NETCore.App]

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

To Solve this, I uninstall all dotnet packages already installed. Then i disable all Microsoft dotnet repos (installed following Net Core web page instructions), then install package dotnet-sdk-3.1.x86_64 from Fedora 32.
Now it works.

dotnet --info ouput it's now:

**SDK de .NET Core (reflejando cualquier global.json):
Version: 3.1.103
Commit: 6f74c4a1dd

Entorno de tiempo de ejecución:
OS Name: fedora
OS Version: 32
OS Platform: Linux
RID: fedora.32-x64
Base Path: /usr/lib64/dotnet/sdk/3.1.103/

Host (useful for support):
Version: 3.1.3
Commit: 4a9f85e9f8

.NET Core SDKs installed:
3.1.103 [/usr/lib64/dotnet/sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.App 3.1.3 [/usr/lib64/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.3 [/usr/lib64/dotnet/shared/Microsoft.NETCore.App]

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

My only doubt is if Fedora will maintain this packages update with future updates or new versions.

Anyway good work , Fedora

[omajid]

My only doubt is if Fedora will maintain this packages update with future updates or new versions.

Speaking as a fedora maintainer: I am sure we will. We do this for other compilers and runtimes like Clang, GCC, OpenJDK, Python and Ruby. I don't see why .NET Core will be an exception.

Anyway good work , Fedora

Thanks, but this wouldn't been possible without the help of all the amazing dotnet maintainers/developers on github here, especially the https://github.com/dotnet/source-build/ folks.

[zdavidlnx]

My only doubt is if Fedora will maintain this packages update with future updates or new versions.

Speaking as a fedora maintainer: I am sure we will. We do this for other compilers and runtimes like Clang, GCC, OpenJDK, Python and Ruby. I don't see why .NET Core will be an exception.

Anyway good work , Fedora

Thanks, but this wouldn't been possible without the help of all the amazing dotnet maintainers/developers on github here, especially the https://github.com/dotnet/source-build/ folks.

Wonderfull to hear that!! And yes, thanks too to dotnet team.

[mairaw]

The issue went to a different tangent it seems. I imagine that the Fedora issues are way different than that same error message on Windows.

I'd be inclined to close this issue since we never heard back from the original author of the thread.
@dagood do we still need a tracking issue for Fedora or does the docs issue cover this?

[dagood]

Agreed on both counts. The Fedora 32 issue is unrelated to the Windows problem in the original post, and without more info there isn't anything we can do there.

For the Fedora 32 problem, https://github.com/dotnet/docs/issues/18347 has a link back to this thread as an example of a thing we should help with in the Microsoft Fedora 32 docs, and I don't see anything else in this thread that needs more tracking.

[jensechu]

Just piping in that I am also running into this on Ubuntu 16.04.4 x64. I don't have a global env variable VERSION set.

/usr/share/dotnet/sdk/2.1.806/NuGet.targets(123,5): error : 'N/A' is not a valid version string. [/root/NadekoBot/src/NadekoBot/NadekoBot.csproj]

dotnet info:

```
.NET Core SDK (reflecting any global.json):
Version: 2.1.806
Commit: a8985a32df

Runtime Environment:
OS Name: ubuntu
OS Version: 16.04
OS Platform: Linux
RID: ubuntu.16.04-x64
Base Path: /usr/share/dotnet/sdk/2.1.806/

Host (useful for support):
Version: 2.1.18
Commit: ba3b934aa4

.NET Core SDKs installed:
2.1.806 [/usr/share/dotnet/sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.18 [/usr/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.18 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.18 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

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

[dagood]

@jensechu can you please get a binlog (http://aka.ms/binlog, so we can diagnose) and open a new issue? More info on that in https://github.com/dotnet/core/issues/4491, which we unfortunately couldn't follow up on because we didn't get diagnostic info. It was similar: NuGet version issue, but unset version didn't help.

[jensechu]

@dagood Sure! I will do this when I wake up tomorrow, sorry. 😄 Thanks for your attention.