Entityframework.docs: dotnet tool install --global dotnet-ef doesnt seem to work with .NET Core 3.1

[ihorbond]

I needed to run db scaffolding so I came here to find "dotnet tool install --global dotnet-ef" command but it failed with error "Tool 'dotnet-ef' failed to install..." Running dotnet --version results in 3.1.100. So I ran "dotnet tool install --global dotnet-ef --version 3.1" and now dotnet-ef installed successfully. Not sure if this is something on my end or anyone else is experiencing this issue ?

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• ID: 263f21d6-6edc-7582-e0e2-fa1c9670bcc0
• Version Independent ID: b3dd8c84-18b1-f98d-64f1-7897d1482692
• Content: EF Core tools reference (.NET CLI) - EF Core
• Content Source: entity-framework/core/miscellaneous/cli/dotnet.md
• Product: entity-framework
• Technology: entity-framework-core
• GitHub Login: @bricelam
• Microsoft Alias: bricelam

[ajcvickers]

@ihorbond I see no reason why the first command should fail while the second one succeeded. If you can provide full details of your system, including what is installed, and attach a project where this error happens, then we will investigate.

[Rick-Anderson]

@ihorbond closing. If you can provide more information we can reopen this issue.

[zliang68]

I have installed DotNet Core SDK 3.1.101 on Windows 10 Pro
This command won't work:
-> dotnet tool install --global dotnet-ef
error NU1100: Unable to resolve 'dotnet-ef ' for '.NETCoreApp,Version=v3.1'.
error NU1100: Unable to resolve 'dotnet-ef ' for '.NETCoreApp,Version=v3.1/any'.
The tool package could not be restored.
Tool 'dotnet-ef' failed to install. This failure may have been caused by:

• You are attempting to install a preview release and did not use the --version option to specify the version.
• A package by this name was found, but it was not a .NET Core tool.
• The required NuGet feed cannot be accessed, perhaps because of an Internet connection problem.
• You mistyped the name of the tool.

For more reasons, including package naming enforcement, visit https://aka.ms/failure-installing-tool

[TylerOdenthal]

I'm getting the same response when installing LUISGen

C:\Users\Tyler\Desktop\ChatWorks>dotnet tool install -g LUISGen
error NU1100: Unable to resolve 'luisgen (>= 0.0.0)' for '.NETCoreApp,Version=v3.1'.
error NU1100: Unable to resolve 'luisgen (>= 0.0.0)' for '.NETCoreApp,Version=v3.1/any'.
The tool package could not be restored.
Tool 'luisgen' failed to install. This failure may have been caused by:

* You are attempting to install a preview release and did not use the --version option to specify the version.
* A package by this name was found, but it was not a .NET Core tool.
* The required NuGet feed cannot be accessed, perhaps because of an Internet connection problem.
* You mistyped the name of the tool.

For more reasons, including package naming enforcement, visit https://aka.ms/failure-installing-tool

[Hartur]

Try specify the version of dotnet-ef. It worked for me;
dotnet tool install --global dotnet-ef --version 3.1.3

[VuyisaM]

Hi I am getting the same error and I used 3.1.3

[mbrookson]

Recently had the same issue installing the latest version for .NET 5.

As suggested above, being explicit with the version also fixed my issue.

dotnet tool install --global dotnet-ef --version 5.0.0