Sorry for posting in an rather old topic - however, it is still a problem.
Thank you for this.
Allthough I must mention that that solution from gmp is also a solid one!
I struggled with this problem with V-Vocal for ages, and never can get a clue on what is working and what not.
I have bought Sonar X2 in the past and so am a legal user of V-Vocal.
I always install X2 on a new setup, and upgrade to Cakewalk latest version.
Everything except V-Vocal works extremely well - Cakewalk is such a great DAW.
I had a recent project which always crashed on a certain wav.
I tried to split in to little pieces - it works (sometimes)
Export to another empty project - it works (without splitting)
Disabling all effects by powering them off - Does NOT work - V-Vocal crashes.
Bypass All FX - button - In my own project with all VST-s and Effect on - Works!!!
I will keep on using this and hopefully it will be consistant.