aspx.net gives blank error message
<p>What could this blank error message mean? I get it randomly in my LOGS. I am using non-cookie sessions.  it occurs randomly in all aspx files..</p>

<p>code handler outputs:
            objErr = Server.GetLastError().GetBaseException()
            Server.ClearError()</p>

<pre><code>Error Message: &amp; objErr.Message.ToString())
Stack Trace: &amp; objErr.StackTrace.ToString())
</code></pre>

<p>output</p>

<pre><code>    Error Message:
    Stack Trace:
    at System.Web.CachedPathData.GetConfigPathData(String configPath) at
  System.Web.CachedPathData.GetVirtualPathData(VirtualPath virtualPath, Boolean 
 permitPathsOutsideApp) at System.Web.HttpContext.GetFilePathData() at 
 System.Web.HttpContext.GetConfigurationPathData() at
 System.Web.HttpContext.get_ImpersonationToken() at
 System.Web.ClientImpersonationContext.Start(HttpContext context, Boolean throwOnError) at
 System.Web.HttpApplication.ThreadContext.Enter(Boolean setImpersonationContext) at 
 System.Web.HttpApplication.OnThreadEnterPrivate(Boolean setImpersonationContext) at 
 System.Web.HttpApplication.ApplicationStepManager.ResumeSteps(Exception error)
</code></pre>
