Hello, Barry!

Callstack indicates that exception was thrown from .NET Framework code.
No wonder you cannot find the line that throws the exception.

Callstack also "says" that there was NullReferenceException in the
System.Web.UI.Control.ResolveClientUrl(...) and that HtmlLink control is
being rendered.

You wrote  on Wed, 15 Aug 2007 20:12:17 +0530:

B> I get te following error message, i am unable to find the line from
B> where the error is being throw, can anyone help

B> System.Web.HttpUnhandledException: Exception of type
B> 'System.Web.HttpUnhandledException' was thrown. --->
B> System.NullReferenceException: Object reference not set to an instance
B> of an object.
B>    at System.Web.UI.Control.ResolveClientUrl(String relativeUrl)
B>    at
B> System.Web.UI.HtmlControls.HtmlLink.RenderAttributes(HtmlTextWriter
B> writer)
B>    at System.Web.UI.HtmlControls.HtmlLink.Render(HtmlTextWriter writer)
B>    at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer,
B> ControlAdapter adapter)
B>    at System.Web.UI.Control.RenderControl(HtmlTextWriter writer,
B> ControlAdapter adapter)
B>    at System.Web.UI.Control.RenderControl(HtmlTextWriter writer)
B>    at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter
B> writer, ICollection children)
B>    at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer)
B>    at System.Web.UI.HtmlControls.HtmlHead.RenderChildren(HtmlTextWriter
B> writer)
B>    at
B> System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter
B> writer)
B>    at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer,
B> ControlAdapter adapter)
B>    at System.Web.UI.Control.RenderControl(HtmlTextWriter writer,
B> ControlAdapter adapter)
B>    at System.Web.UI.Control.RenderControl(HtmlTextWriter writer)
B>    at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter
B> writer, ICollection children)
B>    at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer)
B>    at System.Web.UI.Page.Render(HtmlTextWriter writer)
B>    at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer,
B> ControlAdapter adapter)
B>    at System.Web.UI.Control.RenderControl(HtmlTextWriter writer,
B> ControlAdapter adapter)
B>    at System.Web.UI.Control.RenderControl(HtmlTextWriter writer)
B>    at System.Web.UI.Page.ProcessRequestMain(Boolean
B> includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
B>    --- End of inner exception stack trace ---
B>    at System.Web.UI.Page.HandleError(Exception e)
B>    at System.Web.UI.Page.ProcessRequestMain(Boolean
B> includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
B>    at System.Web.UI.Page.ProcessRequest(Boolean
B> includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
B>    at System.Web.UI.Page.ProcessRequest()
B>    at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
B>    at System.Web.UI.Page.ProcessRequest(HttpContext context)
B>    at ASP.default_aspx.ProcessRequest(HttpContext context) in
B> j:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET
B> Files\root\0b1db5bb\56bddf8f\App_Web_dzz36e3y.10.cs:line 0
B>    at
B> System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpAppli
B> cation.IExecutionStep.Execute()
B>    at System.Web.HttpApplication.ExecuteStep(IExecutionStep step,
B> Boolean& completedSynchronously)

With best regards, Vadym Stetsiak.
Blog: http://vadmyst.blogspot.com

Try using the web deployment project before testing again. And make sure it
creates the PDB file, so you can see where the issue is.

As it stands, the exception is thrown high up the stack, but without seeing
your code, I could not even guess what is causing the issue.