[Solved] 'XXXX' is not a known element.

[David]

I am trying to get the prometheus controls working in Visual Studio web developer and they are constantly giving me an error:  For every control on the page (telerik controls) with the exception of the RadAjaxPanel I am getting the following errors:

Error    1    Element 'RadTreeView' is not a known element. This can occur if there is a compilation error in the Web site.  

Error    2    Validation (Internet Explorer 6): Element 'nodes' is not supported.  


and so on down the list of controls.  I am using a chart, grid and tree on this page.  None of which make it through the debugger (although they all work correctly)

I have the following references in my pages (asp.net with c# codebehind).
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Charting" Assembly="Telerik.Charting" %>

using Telerik.Web.UI;
using Telerik.Charting;

Any help would be appreciated I can't seem to figure out why this isn't working (well it is working but it's blowing up VS)  Thanks in advance.

~David

[Maria Ilieva]

Hi David,

Thank you for contacting us.

The described issue may occur when you are using  a virtual directory that points to a remote share to host a Microsoft ASP.NET-based application. In this case you may receive error messages  that are similar to one that you have listed in your message. If this is your scenario, note that VS IDE throws this error because it cannot locate the controls assemblies due to  insufficient trust permissions. You can read the following MS KB article: "System.Security.SecurityException: Security error" error message when the virtual directory points to a remote share in ASP.NET.

I hope this information helps.

Sincerely yours,
Maria Ilieva
the Telerik team

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