[ERROR] Error: Failed to start OmniSharp

[jrieken]

From @egenita on March 10, 2016 6:28

[INFO] Starting OmniSharp at 'd:\dev\aspnet vnext\MovieAngularJsApp'...
[INFO] Started OmniSharp from 'C:\Users\EGenita.vscode\extensions\ms-vscode.csharp-0.3.3\bin\omnisharp.cmd' with process id 3228...
System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)
at System.Reflection.RuntimeAssembly.get_DefinedTypes()
at System.Composition.Hosting.ContainerConfiguration.b__0(Assembly a)
at System.Linq.Enumerable.d__142.MoveNext() at System.Composition.TypedParts.TypedPartExportDescriptorProvider..ctor(IEnumerable1 types, AttributedModelProvider attributeContext)
at System.Composition.Hosting.ContainerConfiguration.CreateContainer()
at Microsoft.CodeAnalysis.Host.Mef.MefHostServices.Create(IEnumerable1 assemblies) at OmniSharp.OmnisharpWorkspace..ctor(HostServicesBuilder builder) at lambda_method(Closure , LifetimeContext , CompositionOperation ) at System.Composition.TypedParts.ActivationFeatures.DisposalFeature.<>c__DisplayClass1.<RewriteActivator>b__0(LifetimeContext c, CompositionOperation o) at System.Composition.Hosting.Core.LifetimeContext.GetOrCreate(Int32 sharingId, CompositionOperation operation, CompositeActivator creator) at System.Composition.TypedParts.ActivationFeatures.LifetimeFeature.<>c__DisplayClass2.<RewriteActivator>b__0(LifetimeContext c, CompositionOperation o) at System.Composition.Hosting.Core.CompositionOperation.Run(LifetimeContext outermostLifetimeContext, CompositeActivator compositionRootActivator) at System.Composition.Hosting.Core.LifetimeContext.TryGetExport(CompositionContract contract, Object& export) at System.Composition.Hosting.CompositionHost.TryGetExport(CompositionContract contract, Object& export) at System.Composition.CompositionContext.GetExport(CompositionContract contract) at System.Composition.CompositionContext.GetExport[TExport](String contractName) at OmniSharp.Startup.Configure(IApplicationBuilder app, IServiceProvider serviceProvider, ILibraryManager manager, IOmnisharpEnvironment env, ILoggerFactory loggerFactory, ISharedTextWriter writer, IOptions1 optionsAccessor)
[ERROR] Error: Failed to start OmniSharp

Copied from original issue: microsoft/vscode#3949

[DustinCampbell]

@egenita, is this still an issue?

[hickford]

I have a similar problem "Error starting OmniSharp"

[INFO] Starting OmniSharp at 'c:\Users\User\Documents\Visual Studio 2015\Projects\ConsoleApplication4\ConsoleApplication4.sln'...
[INFO] Started OmniSharp from 'C:\Users\User\.vscode\extensions\ms-vscode.csharp-0.3.7\bin\omnisharp.cmd' with process id 12956...
System.InvalidOperationException: Failed to resolve the following dependencies for target framework 'DNX,Version=v4.5.1':
   ICSharpCode.NRefactory 6.0.0-alpha3
   Kestrel 1.0.0-beta4
   Microsoft.AspNet.Diagnostics 1.0.0-beta4
   Microsoft.AspNet.Diagnostics.Interfaces 1.0.0-beta4
   Microsoft.AspNet.FeatureModel 1.0.0-beta4
   Microsoft.AspNet.FileProviders 1.0.0-beta4
   Microsoft.AspNet.FileProviders.Interfaces 1.0.0-beta4
   Microsoft.AspNet.Hosting 1.0.0-beta4
   Microsoft.AspNet.Hosting.Interfaces 1.0.0-beta4
   Microsoft.AspNet.Http 1.0.0-beta4
   Microsoft.AspNet.Http.Core 1.0.0-beta4
   Microsoft.AspNet.Http.Extensions 1.0.0-beta4
   Microsoft.AspNet.Http.Interfaces 1.0.0-beta4
   Microsoft.AspNet.Server.Kestrel 1.0.0-beta4
   Microsoft.AspNet.WebUtilities 1.0.0-beta4
   Microsoft.CodeAnalysis 1.0.0-rc2
   Microsoft.CodeAnalysis.Analyzers 1.0.0-rc2
   Microsoft.CodeAnalysis.Common 1.0.0-rc2
   Microsoft.CodeAnalysis.CSharp 1.0.0-rc2
   Microsoft.CodeAnalysis.CSharp.Features 1.0.0-rc2
   Microsoft.CodeAnalysis.CSharp.Workspaces 1.0.0-rc2
   Microsoft.CodeAnalysis.VisualBasic 1.0.0-rc2
   Microsoft.CodeAnalysis.VisualBasic.Workspaces 1.0.0-rc2
   Microsoft.CodeAnalysis.Workspaces.Common 1.0.0-rc2
   Microsoft.Composition 1.0.30
   Microsoft.Framework.Caching.Interfaces 1.0.0-beta4
   Microsoft.Framework.Caching.Memory 1.0.0-beta4
   Microsoft.Framework.ConfigurationModel 1.0.0-beta4
   Microsoft.Framework.ConfigurationModel.Interfaces 1.0.0-beta4
   Microsoft.Framework.ConfigurationModel.Json 1.0.0-beta4
   Microsoft.Framework.DependencyInjection 1.0.0-beta4
   Microsoft.Framework.DependencyInjection.Interfaces 1.0.0-beta4
   Microsoft.Framework.FileSystemGlobbing 1.0.0-beta4
   Microsoft.Framework.Logging 1.0.0-beta4
   Microsoft.Framework.Logging.Console 1.0.0-beta4
   Microsoft.Framework.Logging.Interfaces 1.0.0-beta4
   Microsoft.Framework.OptionsModel 1.0.0-beta4
   Microsoft.Framework.Runtime.Interfaces 1.0.0-beta4
   Microsoft.Framework.WebEncoders.Core 1.0.0-beta4
   Microsoft.Net.Http.Headers 1.0.0-beta4
   Microsoft.Web.Xdt 2.1.1
   Newtonsoft.Json 7.0.1
   NuGet.Configuration 3.1.0

Searched Locations:
  C:\Users\User\.vscode\extensions\ms-vscode.csharp-0.3.7\bin\packages\OmniSharp\1.0.0\{name}\project.json
  C:\Users\User\.vscode\extensions\ms-vscode.csharp-0.3.7\bin\src\{name}\project.json
  C:\Users\User\.vscode\extensions\ms-vscode.csharp-0.3.7\bin\packages\{name}\{version}\{name}.nuspec
  C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.1\{name}.dll
  C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.1\Facades\{name}.dll
  C:\Windows\Microsoft.NET\assembly\GAC_32\{name}\{version}\{name}.dll
  C:\Windows\Microsoft.NET\assembly\GAC_64\{name}\{version}\{name}.dll
  C:\Windows\Microsoft.NET\assembly\GAC_MSIL\{name}\{version}\{name}.dll

Try running 'dnu restore'.

   at Microsoft.Framework.Runtime.DefaultHost.GetEntryPoint(String applicationName)
   at Microsoft.Framework.ApplicationHost.Program.ExecuteMain(DefaultHost host, String applicationName, String[] args)
   at Microsoft.Framework.ApplicationHost.Program.Main(String[] args)

[DustinCampbell]

This is pretty stale at this point, especially given that DNX, DNU, DNVM and all of that are going and .NET Core is here to stay. I'm going to close this issue, but please let me know if it's still a problem.