The editor often crashed again after entering a timetable. This really isn't fun anymore! JUST FIX THIS NOW! There have been plenty of reports that the editor is crash-sensitive. DTG now also knows where it all comes from. And we refuse to solve it again.
Is this timetable your making if so then its down to you to find the problem. Have you left a train entry blank somewhere for instance, have you put for formations into layers grouped so if a piece of dlc is not there the game won't try to load it which would cause a null exception. If its a dtg timetable your trying to enter, what have you done to the timetable anything at all.