Ninject MVC3 - bootstrapper throwing "Already Initialized" exception

Question

I've created an empty Asp.Net MVC3 project, and used nuget install-package Ninject.MVC3

Without doing anything else (no services registered and not even a controller created) I run the application.

The Project breaks on line 22 in NinjectMVC3.cs with the following exception:

[InvalidOperationException: Already Initialized!] Ninject.Web.Mvc.Bootstrapper.Initialize(Func`1 createKernelCallback) in c:\Projects\Ninject\Maintenance2.2\ninject.web.mvc\mvc3\src\Ninject.Web.Mvc\Bootstrapper.cs> :58 Mvc.App_Start.NinjectMVC3.Start() in c:\Projects\Events\Events\App_Start\NinjectMVC3.cs:22

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner) +0
System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner) +72
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) +335
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +28
System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) +19
WebActivator.BaseActivationMethodAttribute.InvokeMethod() +199 WebActivator.ActivationManager.RunActivationMethods() +330 WebActivator.ActivationManager.RunPreStartMethods() +27 WebActivator.ActivationManager.Run() +39

The line in NinjectMVC3.cs is:

public static void Start()          {             DynamicModuleUtility.RegisterModule(typeof(OnePerRequestModule));             DynamicModuleUtility.RegisterModule(typeof(HttpApplicationInitializationModule));             bootstrapper.Initialize(CreateKernel); // <- this one right here...         } 

What is going on with this? I've used Ninject for MVC3 in other projects without problems at all. I do notice that the second line in the Start() method is not included in older (weeks) packages of Ninject.MVC3, so maybe something else has been broken in a recent update also?

Please help!

Edit to address answer from Remo

This is from my global.asax.cs

 public class MvcApplication : System.Web.HttpApplication  { 

The global.asax is 100% standard aswell. No adjustments done.

EDIT - Problem is gone...

I honestly have no idea what caused this, but after a few restarts of Visual Studio, and a full reboot, the project is working as it should. Neither can I recreate the problem in new projects.

Sorry for wasting your time :)

Answer 1

Take a look at Setting up a MVC3-application

In short:

You probably have een App_Start folder in your project with a NinjectMVC3.cs file.

When using the NuGet package in combination with modifying the Global.asax (for which there is no reason) you have to remove the App_Start folder and remove the references to WebActivator and Microsoft.Web.Infrastructure

Answer 2

This situation came up for me when i changed the namespaces of my project, then switched it back again.

even when i cleaned the solution and did an iisreset it came back with 'already initialized'.

the problem arose from the dlls that had been created in the bin directory when i changed the namespace and built the project - after changing the namespaces back and cleaning the solution the dlls from the alternative namespace were still there, and hence were being loaded when the web application started up, causing the 'already initialized' error.

deleting the dlls fixed the issue.