title: MVC 4 Error(how can correct server error in '/' application?)
body: <p><strong>Description:</strong> An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. </p>
  
  <p><strong>Exception Details:</strong> </p>
  
  <blockquote>
    <p>System.Reflection.AmbiguousMatchException: The current request for
    action 'index' on controller type 'CategoryController' is ambiguous
    between the following action methods: System.Web.Mvc.ActionResult
    Index() on type Onclickmuseum.Controllers.CategoryController
    System.Web.Mvc.ActionResult Index(Onclickmuseum.Models.CategoryModel)
    on type Onclickmuseum.Controllers.CategoryController</p>
  </blockquote>
  
  <p><strong>Source Error:</strong> </p>
  
  <p>An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.</p>
  
  <p>Stack Trace: </p>
  
  <blockquote>
    <p>[AmbiguousMatchException: The current request for action 'index' on
    controller type 'CategoryController' is ambiguous between the
    following action methods: System.Web.Mvc.ActionResult Index() on type
    Onclickmuseum.Controllers.CategoryController
    System.Web.Mvc.ActionResult Index(Onclickmuseum.Models.CategoryModel)
    on type Onclickmuseum.Controllers.CategoryController]<br>
    System.Web.Mvc.Async.AsyncActionMethodSelector.FindAction(ControllerContext
    controllerContext, String actionName) +276<br>
    System.Web.Mvc.Async.ReflectedAsyncControllerDescriptor.FindAction(ControllerContext
    controllerContext, String actionName) +181<br>
    System.Web.Mvc.ControllerActionInvoker.FindAction(ControllerContext
    controllerContext, ControllerDescriptor controllerDescriptor, String
    actionName) +52<br>
    System.Web.Mvc.Async.AsyncControllerActionInvoker.BeginInvokeAction(ControllerContext
    controllerContext, String actionName, AsyncCallback callback, Object
    state) +295<br>
    System.Web.Mvc.&lt;>c_<em>DisplayClass1d.b</em>_17(AsyncCallback
    asyncCallback, Object asyncState) +83<br>
    System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback
    callback, Object state, Int32 timeout) +161</p>
  </blockquote>