Getting No route in the route table matches the supplied values for SurfaceController after upgrade from v4

Questions
1

I recently upgarded our intranet Umbraco site from v4 (WebForms) to v7.2 (MVC) and now I am in the process of converting some of the usercontrols.

I am not sure what I am missing here but I can't get this to work. I tried creating a SurfaceController in a new install of Umbraco 7.2 using Visual Studio and I had no issues but in the existing solution it refused to detect the SurfaceController.

Calling it like so:

@Html.Action("StatusInfo", "ServiceStatusSurface")


using Umbraco.Web.Mvc; using System.Web.Mvc;
namespace MyUmbracoApp.Controllers 
{ 
         public class ServiceStatusSurfaceController : SurfaceController 
        { 
           // can't reach this either: 
           public ActionResult Index() 
          { 
              return Content("hello world"); 
          }
    // this is what I am trying to reach
    [ChildActionOnly]
    public ActionResult ServiceStatusInfo()
    {
       // do some stuff to get the status

    </span><span class="kwd" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #00008b; background: transparent;">return</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; background: transparent;"> </span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: #2b91af; background: transparent;">CurrentUmbracoPage</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; background: transparent;">();</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; background: transparent;">
</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; background: transparent;">}</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; background: transparent;">



}


}
This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/60465-getting-no-route-in-the-route-table-matches-the-supplied-values-for-surfacecontroller-after-upgrade-from-v4