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Dotnet new fails: Object reference not set to an instance of an object

See original GitHub issue

Steps to reproduce

dotnet new console and dotnet new

Expected behavior

Creates a new console app / lists help for dotnet new

Actual Behavior

Getting ready...
Object reference not set to an instance of an object.
   at Microsoft.TemplateEngine.Edge.Settings.SettingsLoader.Save(TemplateCache cacheToSave)
   at Microsoft.TemplateEngine.Edge.Settings.SettingsLoader.Save()
   at Microsoft.TemplateEngine.Cli.Installer.InstallPackages(IEnumerable`1 installationRequests, IList`1 nuGetSources, Boolean debugAllowDevInstall)
   at Microsoft.TemplateEngine.Cli.Installer.InstallPackages(IEnumerable`1 installationRequests)
   at Microsoft.DotNet.Tools.New.NewCommandShim.FirstRun(IEngineEnvironmentSettings environmentSettings, IInstaller installer)
   at Microsoft.TemplateEngine.Cli.New3Command.ConfigureEnvironment()
   at Microsoft.TemplateEngine.Cli.New3Command.Initialize()
   at Microsoft.TemplateEngine.Cli.New3Command.ExecuteAsync()
   at Microsoft.TemplateEngine.Cli.CommandParsing.NewCommandInputCli.<>c__DisplayClass19_0.<<OnExecute>b__0>d.MoveNext()

Environment Data

dotnet --info

.NET Core SDK (reflecting any global.json):
 Version:   3.1.100
 Commit:    cd82f021f4

Runtime Environment:
 OS Name:     opensuse-tumbleweed
 OS Version:  20191204
 OS Platform: Linux
 RID:         linux-x64
 Base Path:   /usr/share/dotnet/sdk/3.1.100/

Host (useful for support):
  Version: 3.1.0
  Commit:  157910edee

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

.NET Core runtimes installed:
  Microsoft.AspNetCore.App 3.1.0 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 3.1.0 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

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

Tried Fixes in Dotnet new fails: Object reference not set to an instance of an object #657

ie.

dotnet new --debug:reinit
rm -rf ~/.templateengine

Did not have this problem with dotnet sdk 2.0.

Issue Analytics

State:
Created 4 years ago
Reactions:2
Comments:7

Top GitHub Comments

14reactions

mdx0111commented, Dec 24, 2019

I fixed it by wiping the “/usr/share/dotnet/templates” and “~/.templateengine” folders. Then reinstalling dotnet core 3.1 and then running dotnet new --debug:reinit.

Everything works fine now.

1reaction

rescobarmcommented, Nov 26, 2020

Tenía el mismo problema con net5.0. Borré “/usr/share/dotnet/templates” como dice JorgeGomez y listo. Pero ahora me sale el siguiente error: The framework ‘Microsoft.AspNetCore.App’, version ‘5.0.0’ was not found.