Hi

Managed to install v1.3 on 4.5.2 / IIS6 / .NET 4 and the 301 Tree shows and manages the mappings (custom or generated automatically). However, the 404 page now shows

[NullReferenceException: Object reference not set to an instance of an object.]
   umbraco.requestHandler..ctor(XmlDocument umbracoContent, String url) +2683
   umbraco.UmbracoDefault.Page_PreInit(Object sender, EventArgs e) +1438
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.EventHandler.Invoke(Object sender, EventArgs e) +0
   System.Web.UI.Page.OnPreInit(EventArgs e) +8876158
   System.Web.UI.Page.PerformPreInit() +31
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +328

Is there a property we should have on document types for this to work? I think 404handlers.config is configured correctly:

<NotFoundHandlers>
  <notFound assembly="AutoFolders" type="NotFoundHandler" />
  <notFound assembly="umbraco" type="SearchForAlias" />
  <notFound assembly="umbraco" type="SearchForTemplate" />
  <notFound assembly="umbraco" type="SearchForProfile" />
  <notFound assembly="InfoCaster.Umbraco._301UrlTracker" type="Handler301URLTracker" />
  <notFound assembly="umbraco" type="handle404" />
</NotFoundHandlers>

Just before the error the umbraco trace shows

umbracoRequestHandler    pageXPathQueryStart: '/root'    
notFoundHandler    Trying NotFoundHandler 'AutoFolders.NotFoundHandler'...
notFoundHandler    Trying NotFoundHandler 'umbraco.SearchForAlias'...    
urlAlias    'debt/'    
notFoundHandler    Trying NotFoundHandler 'umbraco.SearchForTemplate'...    
umbracoRequestHandler    xpath: '/* [@urlName = "home"]/* [@urlName = "debt"]'    
umbracoRequestHandler    xpath: '/root/*'    
umbracoRequestHandler    xpath: '/root/* [@urlName = "debt"] | /root/*'    
umbracoRequestHandler    xpath: '/root/* [@urlName = "debt"] | /root/*/* [@urlName = "debt"]'    
notFoundHandler    Trying NotFoundHandler 'umbraco.SearchForProfile'...    
Unhandled Execution Error    
Object reference not set to an instance of an object....

Thanks
Julio