January 30, 2012

Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed.

Message: 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.

If you are getting above error in a page having AJAX UpdatePanel, add the Control as a PostBackTrigger


 <asp:UpdatePanel ID="medUP" runat="server">
        <Triggers>
            <asp:PostBackTrigger ControlID="exportButton" />
        </Triggers>
        <ContentTemplate>

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