Nov 20, 2009 11:06 AM|shancock_65|LINK
I added this event handler to my ScriptManager:
protected void ScriptManager1_AsyncPostBackError(object sender, AsyncPostBackErrorEventArgs e)
ScriptManager1.AsyncPostBackErrorMessage = e.Exception.Message;
This allowed the EXACT error message to be displayed back to my browser, and, I was able to correct the real issue rather quickly, which in my case was a missing database stored procedure.
Talk about a pain in the HOO Ha. This error wasted alot of my time, so I hope this solution will help make someones life a little easier...
Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occured while processing the request on the server server code 500