I had both Sonar X1 Producer 32 and 64-bit on my rig, then I purchased X2 Producer 64-bit and installed it on my computer, and they both ran well and co-existed for years.  When I purchased Producer X3, I thought, well, maybe I should uninstall both X1 versions to make room for X3 64-bit (leaving 64-bit X2 in place).  Everything seemed to go OK.  I installed X3 and it went well and seems to run well, except that now, V-Vocal will not run.  It crashes both X2 and X3.  Now, I'm wondering what went wrong...Any ideas?  Melodyne Editor v2.0 seems to work well, but I still have some projects that I need to finish up with V-Vocal.  Also, I had become quite proficient with V-Vocal and I sort of miss that tool.  Upon crashing, I sent the dmp files to Cakewalk, but no answers or solutions have been heard from them (yet).  

Most probably the X1 uninstaller took out the VVocal content files and left the dll which is why its crashing.
You will probably have to reinstall VVocal from the X2 disk to restore its installation files...

Thanks, Noel.  I was hoping that there might be some kind of solution to the problem.  You've given me hope.  I will post back after trying your suggestion.
 
Thanks.

Looked at X2 disk, but V-Vocal is not listed separately.  I wonder if I would want to install the "Libraries" files or the "Audio Plugins" files?

It is the SONAR install (Disk1) but when given the option choose Advanced install. The Advanced install will provide a checklist of components to install. V-Vocal is a plug-in in the checklist.

Thanks, Scook.  I did do the advanced install, but it was not listed in the plugin list.  I went ahead and installed the Sonar main program and it did indeed appear as a region effect like Melodyne does and I amd able to invoke it.  However, it turns out that the actual ability to view the yellow pitch lines are not there, therefore I am unable to manipulate any pitch lines like I used to.  Any ideas?

I do not have X3 installed. You could validate V-Vocal function in X2.

So, I guess the bigger question is, does Sonar X3 still have the ability to utilize V-Vocal, or is it only an X2 and earlier utility?

Oh, by the way, it does work correctly in X2 now.  That's why I'm questioning if it is broken in X3...
 

It is supposed to work in X3.