ASP.NET XML Parsing Error: no element found Line Number 1, Column 1 Error

Question

Hey I found a weird temperamental page which randomly gives me the following error

XML Parsing Error: no element found
Location: http://kj2011/site_2011/nonprofit-data         


        

Answer 1

In my case it was the AjaxControlToolkit.dll that was missing from the bin folder. Adding a breakpoint in the Application_Error method in global.asax as suggested above allowed me to find this out.