Error message: Object reference not set to an instance of an object.

Url: http://xanthoulis.com/skin.aspx?lang=en&itemtype=Product&itemid=00002E4D&action=view&

Message: Object reference not set to an instance of an object.

   at Bone.BONE.FindType(String type_name) in C:\Bone\Bone\src\BONE.cs:line 1784
   at Cms.Link.ParseUrl(String urlexpression) in C:\Bone\Cms\src\DBItems\LinkScope\Link\Link.cs:line 229
   at Cms.Link.get_Url() in C:\Bone\Cms\src\DBItems\LinkScope\Link\Link.cs:line 208
   at Cms.Link.get_LinkedCaption() in C:\Bone\Cms\src\DBItems\LinkScope\Link\Link.cs:line 174
   at ASP.skin_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in c:\inetpub\vhosts\xanthoulis\skin.aspx:line 379
   at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   at System.Web.UI.Page.Render(HtmlTextWriter writer)
   at Bone.Asp.RenderSkin(TextWriter w) in C:\Bone\Bone\src\Classes\Asp.cs:line 71
   at Bone.ModalAction.RenderPage(TextWriter w) in C:\Bone\Bone\src\Actions\Modal.cs:line 81
   at Bone.Asp.Render(HtmlTextWriter w) in C:\Bone\Bone\src\Classes\Asp.cs:line 82
   at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)