When I try to access the member of jasonp object(val.pc_eventDate) it gives undefined error. But the val object 12 member and all members has values.

  $.ajax({
                type: "GET",
                url: URL,
                dataType: "jsonp",
                jsonp: "callback",
                jsonpCallback: "GetAppointmentCallback",
                success: ServiceSuccess,
                error: ServiceFailed
   });

function GetAppointmentCallback(json) {

    $.each(json.GetAppointmentsResult, function (data_, val) {
        var myDate = new Date(val.pc_eventDate.match(/\d+/)[0] * 1);

        var time = GetPThhHmmMTime(val.pc_startTime.toString());
......
......
......
    });
}