Hi all,i believe that it's a knowledge problem with VVocal.It's an awesome weapon for me and i have not a stability problem.I often use it on bass and sax mono tracks for time and tone corrections with incredible satisfaction. It's my experience.Best.Roby

I use V-vocal all the time... on small clips only. After I bounce the clip, if I later find something is not quite right yet, I simply delete the rendered clip, go back to the original (V-vocal) clip, make some minor tweaks, and bounce the clip again. Just takes a few minutes, and works very well.   My 2 cents...

Also FWIW ...  I use Melodyne Assistant.  I consistently got crashes with X1 when I tried using V-Vocal.  Just for kicks, I tried pulling up V-Vocal in X2.  Comes up fine, now!

I'm currently a big fan of Melodyne.  But, in the future I'll include trying V-Vocal if I want to just do a quick tweak or if I have trouble getting what I want in Melodyne.  

I typically will take a full, solo vocal track to Melodyne from Sonar, tweak it with Melodyne standalone, then pull the full track back into Sonar.  No crashes with this approach.  I lose context, but so far that's not been an issue.  If any clips are out of sync, I can tweak those just fine in Sonar.

BTW, I love lane management in X2.

Yeah you are better off working with shorter clips in Sonar.

Hopefully you don't need to tweak every single note of a full vocal track!