I agree. It happens here from time to time but I couldn’t say that it was a Nuendo problem. It may be my UFX interface, a temporary sync issue or the PC just having a bad morning.
I had this when opening old project files on a previous version of Nuendo. As long as I use templates created on the current version with newly created projects I don’t have this problem. I’ve never been able to narrow down the issue. I think I was able to take events and copy/paste them to the same location/track and they started playing. It was weird. Come to think of it I think some played back but at the wrong timecode. So if I had an event at 01:10:00:00 it might have played back correctly starting at 01:14:30:14 or whatever. But copy/pasting it back to 01:10:00:00 got it to play back fine.
Well, today, Friday the 13th, I walked in and fired up my system and…no sound! New sessions from working templates, new sessions from scratch, sessions that worked yesterday, nothing plays audio UNLESS I disable Control Room. Rebooting did not help. ProTools and Twisted Wave work fine via the RME I/O, only Nuendo will not play via the ADAT outputs (again, unless Control Room is disabled).
UPDATE: I trashed prefs and rebuilt them, replacing them from the old prefs folder; the defaults preference appears to be the culprit.