Server Error in '/' Application.

I would guess there is some version mismatch when you run the site. This can be either because your project has a hard reference to a faulty version of one of the assemblies (the EPiServer.Framework you added is a suspect) or that your web.config lacks assembly redirects which could take care of such a version conflict.

Compare your working projects of the same version to this project. First, compare the assembly redirects in web.config so that they point to the same versions as in the working project. If still no luck, check the references of the project and compare it to the working projects - are any files added with specific version etc. Match the working project. You can open the .csproj files and compare the reference includes perhaps in a simpler way than by doing it in visual studio.

Another approach is to launch the Assembly Binding Log Viewer (fuslogvw) and check for binding errors (though in my experience it's easier said than done to work with that tool).

For some reason all the dlls were not copied to the build dir "/bin". I had to manully copy all the EPi dlls from a working project in order to get it working. And cause EPiServer.Framework.dll is in the build dir, therefor there is no need to manually add Framework as the reference in the VS project.

They are never copied to the bin dir if they are not added as references. That goes for all dll:s, not just episerver. That does not mean that you should add loads of dll:s as references. Many developers use a copy task or post-build event to copy the files from a library folder to bin when building.

Hi, did you manage to fix the problem?

Sorry for stealing this thread but I have a similar problem:

<code>

[CompositionException: The composition produced a single composition error. The root cause is provided below. Review the CompositionException.Errors property for more detailed information.

1) The export 'EPiServer.Research.iPhoneExample.iPhoneGadgetsInitializer (ContractName="EPiServer.Framework.IInitializableModule")' is not assignable to type 'EPiServer.Framework.IInitializableModule'.

Resulting in: Cannot set import 'EPiServer.Framework.Initialization.InitializationEngine.Modules (ContractName="EPiServer.Framework.IInitializableModule")' on part 'EPiServer.Framework.Initialization.InitializationEngine'.
Element: EPiServer.Framework.Initialization.InitializationEngine.Modules (ContractName="EPiServer.Framework.IInitializableModule") -->  EPiServer.Framework.Initialization.InitializationEngine
]
   System.ComponentModel.Composition.CompositionResult.ThrowOnErrors(AtomicComposition atomicComposition) +114
   System.ComponentModel.Composition.CompositionResult.ThrowOnErrors() +31
   System.ComponentModel.Composition.Hosting.ComposablePartExportProvider.Compose(CompositionBatch batch) +1470
   System.ComponentModel.Composition.Hosting.CompositionContainer.Compose(CompositionBatch batch) +73
   System.ComponentModel.Composition.AttributedModelServices.ComposeParts(CompositionContainer container, Object[] attributedParts) +284
   EPiServer.Framework.Initialization.InitializationModule.Initialize(HostType hostType) +147
   EPiServer.Framework.Initialization.InitializationModule.FrameworkInitialization(HostType hostType) +68
   EPiServer.Global..ctor() +54
   EPiServer.Templates.Global..ctor() +4
   ASP.global_asax..ctor() in c:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\54e243d5\24ea87bf\App_global.asax.c8ny1yl1.0.cs:0

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache) +86
   System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache) +230
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +67
   System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +1051
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +111
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +215
   System.Web.HttpApplicationFactory.GetPipelineApplicationInstance(IntPtr appContext, HttpContext context) +56
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +231

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +8901019
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +85
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +333

</code>

This after upgrading our stageing enviroment.

I've copied all episerver dlls into the bin folder.

Thanks in advance.

Just noticed, EPiServer has NuGet repo with EPiServer Core in it. Maybe adding the depandencies via nuget can help.