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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 Responsed.Write(),response filters,HttpModules, or server trace is enabled.
Details:Error parsing near' ("<script language='ja'
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System.Web.UI.ScriptManager.RegisterStartupScript(UpdatePanel1, this.GetType(), "", "alert('" + error.Message.ToString() + "');history.back(-1);", true);
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When web pages or applications begin to feel slow, analyzing assets as they come over the wire and profiling scripts while they are running allows you to focus your optimization efforts where they are needed most.
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