Mvc: "Can not find compilation library location for package.." error right after installing .NET Core 2.0 SDK

[jomargon]

I have an ASP.NET Core 1.1 website that targets .NET Framework 4.6.1. Now after installing .NET Core SDK 2.0, I can't view any of the pages because of the error:

InvalidOperationException: Can not find compilation library location for package 'xxx'

Below is the stack trace. Not sure if it's really Razor-related. The site works after uninstalling .NET Core 2.0 SDK.

Microsoft.Extensions.DependencyModel.CompilationLibrary.ResolveReferencePaths()
Microsoft.AspNetCore.Mvc.ApplicationParts.AssemblyPart+<>c.b__8_0(CompilationLibrary library)
System.Linq.Enumerable+d__16.MoveNext()
Microsoft.AspNetCore.Mvc.Razor.Compilation.MetadataReferenceFeatureProvider.PopulateFeature(IEnumerable parts, MetadataReferenceFeature feature)
Microsoft.AspNetCore.Mvc.ApplicationParts.ApplicationPartManager.PopulateFeature(TFeature feature)
Microsoft.AspNetCore.Mvc.Razor.Internal.RazorReferenceManager.GetCompilationReferences()
System.Threading.LazyInitializer.EnsureInitializedCore(ref T target, ref bool initialized, ref object syncLock, Func valueFactory)
Microsoft.AspNetCore.Mvc.Razor.Internal.RazorReferenceManager.get_CompilationReferences()
Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRoslynCompilationService.CreateCompilation(string compilationContent, string assemblyName)
Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRoslynCompilationService.Compile(RelativeFileInfo fileInfo, string compilationContent)
Microsoft.AspNetCore.Mvc.Razor.Internal.RazorCompilationService.Compile(RelativeFileInfo file)
Microsoft.AspNetCore.Mvc.Razor.Internal.CompilerCache.CreateCacheEntry(string relativePath, string normalizedPath, Func compile)
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNetCore.Mvc.Razor.Internal.CompilerCache.GetOrAdd(string relativePath, Func compile)
Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorPageFactoryProvider.CreateFactory(string relativePath)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.CreateCacheResult(HashSet expirationTokens, string relativePath, bool isMainPage)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.OnCacheMiss(ViewLocationExpanderContext expanderContext, ViewLocationCacheKey cacheKey)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.LocatePageFromViewLocations(ActionContext actionContext, string pageName, bool isMainPage)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.FindView(ActionContext context, string viewName, bool isMainPage)
Microsoft.AspNetCore.Mvc.ViewEngines.CompositeViewEngine.FindView(ActionContext context, string viewName, bool isMainPage)
Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.ViewResultExecutor.FindView(ActionContext actionContext, ViewResult viewResult)
Microsoft.AspNetCore.Mvc.ViewResult+d__26.MoveNext()
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker+d__30.MoveNext()
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker+d__28.MoveNext()
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ResultExecutedContext context)
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker+d__22.MoveNext()
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ResourceExecutedContext context)
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker+d__20.MoveNext()
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNetCore.Builder.RouterMiddleware+d__4.MoveNext()
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNetCore.Session.SessionMiddleware+d__9.MoveNext()
Microsoft.AspNetCore.Session.SessionMiddleware+d__9.MoveNext()
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware+d__7.MoveNext()

[Eilon]

@pranavkm can you take a look to see what's going on here? Wrong SDK being used maybe?

[pranavkm]

Do you have an repro application that you could share with us?

[jomargon]

I created a very simple repro below. The site won't run if .NET Core 2.0 is installed. Apparently it only happens when you add a reference directly to a .NET Framework dll (point to the bin/*.dll of ClassLibrary2). It works if you add a reference to a project.

https://github.com/jomargon/DotNetCore20IssueRepro

[pranavkm]

@jomargon thanks for the repro. This is essentially a dup of https://github.com/aspnet/Home/issues/2126. I have a work around for it here: https://github.com/aspnet/Home/issues/2126#issuecomment-322325498

[jomargon]

@pranavkm Thanks! Any chance we won't need the workaround on the next minor update? I'd rather wait for a fix than apply the hack.

[Eilon]

@pranavkm should this bug be closed as a dup of https://github.com/dotnet/core-setup/issues/2981 ?

[pranavkm]

@Eilon yup. I'll go ahead and close this.
@jomargon I'm working with the CLI team to get the fix in for the 2.0.1 release.

[ganeshmuthuvelu]

This issue is still happening and not resolved in 2.0.2.
At the same time I do not know for sure if this is resolved in 2.0.2 or not? I see many still seem to have the issue - there are several comments. workarounds, closed as duplicate threads etc., but there is nothing that I could find that clearly says if this is fixed in 2.0.2 or when it will be fixed..

Any help and understanding of our pain will be much appreciated.

[ndeen86]

I am also facing the issue in 2.0.2. I logged the defect in https://github.com/dotnet/core-setup/issues/3397

[xairrick]

Has this been fixed? I installed .NET Core 2.1.4 yesterday and it broke a project is using ASP.NET Core 1.1.1

[ganeshmuthuvelu]

I was about to try upgrading to 2.1.4 after hearing from some that this issue is resolved but looks like this is still a mystery.. Looks like I have to be 1.x for longer :-(
ASP .NET Core Team: Please give us a permanent fix for this issue, I for sure do not need workarounds and so will be many others here.. Thanks for your help!

[Eilon]

Hi folks, if you are still seeing this issue, please log a new issue with detailed steps to reproduce the problem. We have not seen this problem in our testing and otherwise believe the issue is fixed.