I know that this is very late, and potentially useless, but I found the original question while suffering the same conditions listed previously:
- Cubase (6 pro) crashes when I attempt to edit The Grand 3, once I have created a track for it via either adding a VST instrument through the dialog box, OR by Project\Add Track\Instrument method. In the past, adding the track pointing to The Grand 3 would also bring up a status window showing the progress of loading the instrument. This suddenly stopped happening and clicking the Edit Instrument control in the Inspector returned the crash error window and a warning to get my affairs in order in a new version of the file. Curiously, my The Grand 3 SE version would load with no issues…
- The Grand 3 would open just fine in Standalone mode, as others have stated.
Since The Grand 3 was working just fine for years on a dedicated DAW/PC, I ruled out hardware limitations such as RAM or other impediments to loading. Also, my Cubase is workign perfectly with all of my other gear and VST instruments, including the aforementioned The Grand 3.
The Fix: In my case, I updated my eLicenser (no effect on the problem) then, updated The Grand 3 to version 3.1.0. There is an even newer “hot fix” that impacts the Apple universe only. This has fixed the problem, even though the 3.1.0 release notes make no mention of the problem I was experiencing.
This, in retrospect, seemed like an obvious place to look, but since my instance of The Grand 3 was previously working, I didn’t think to look for an update. Live and learn.