>>The actual routing table is created dynamically at startup and it seems that this can't be constructed if the ErrorView() (or other) methods are generic.
>>What's your signature of ErrorView() ?
>>
>
>I posted it in another reply but here it's again:
>
>

public PartialViewResult ErrorView<T>(T viewModel, string viewName, string message, string errorProperty = "") where T : BaseEditViewModel

Could you just use:

public PartialViewResult ErrorView(BaseViewModel viewModel, string viewName, string message, string errorProperty = "")

>
>Similar signatures for other methods, so I commented them as well. Now I'll try to uncomment them and comment just that line instead.
>
>>>I can, of course, try to change the target .NET framework to be 4.5, don't think it will help.
>>>
>>>I've checked few projects in the solution and it says that it's targeting .NET 4.5.1. So why it's showing 4.0 version of the framework?
>>
>>Showing where ?
>
>At the very bottom of the error page:
>
>....
>[HttpException (0x80004005): Cannot call action method 'System.Web.Mvc.PartialViewResult ErrorView[T](T, System.String, System.String, System.String)' on controller 'SysManager.Web.Areas.AccountingAudit.Controllers.PaymentTypesController' because the action method is a generic method.
>Parameter name: methodInfo]
> System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9955652
> System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +101
> System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +254
>
>________________________________________
>Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34237

What's the targetFramework in web.config ?