I am a new user of EMTP. I installed it yesterday. yesterday it was working well but now it's showing an error. my software is not running. when I try to open it it shows an error window. with text written as below. DoMainSetuo Exception at 30: System.FormatException: String was not recognized as a valid DateTime. at system.DateTimeParse(String s, DateTimeFormatinfo dtfi,DateTimeStyles styles} at WpfApplication1.MainWindow.LoadMRUDocs() at WpfApplication1.MainWindow.DoMainSetup() kindly guide me ASAP.