Hi Monty,

You can handle the event "AsyncPostBackError" of the ScriptManager instance
on the WebForm to return a custom message whatever you want:

   protected void ScriptManager1_AsyncPostBackError(object sender,
AsyncPostBackErrorEventArgs e)
   {
       if (e.Exception != null && e.Exception.InnerException != null)
       {
           ScriptManager1.AsyncPostBackErrorMessage =
e.Exception.InnerException.Message;
       }
   }

Above code will correctly show the real exception's message.

Hope this helps.

Regards,
Walter Wang (wawang@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

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