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Query: version=2017&prod=api&lang=english&path=emodelapi%2fedrawings.interop.emodelviewcontrol%7eedrawings.interop.emodelviewcontrol._iemodelviewcontrolevents_oncomponentselectionnotifyeventhandler.html&format=P Help Exp:Exception of type 'System.Web.HttpUnhandledException' was thrown.:: Help Inner Exp:Object reference not set to an instance of an object.