Archives for January 2014

AJAX message could not be parsed

Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled. I ran into this while working with an UpdatePanel. After a partial postback, the returned AJAX would trip that Javascript error. […]