Problem with Vocalsync

Anyone having Vocalsync issues?
Suddenly Vocalsync is no longer working.
It either ERASES the selected track (undo brings it back) or gives me an error saying something like "Program error.  The guide track cannot be .... it may be empty".
 
Any thoughts?
 
My SONAR is really going to crap lately.  CONSTANT crashing and now this.  Yay!

Oh yeah! 
I've tried rebooting, I've reset my interface.
Vocalsync no longer works. Now, as of tonight, Melodyne no longer works.
I wish there was some way of reinstalling just Vocalsync.
Apparently there is a "Region Effects" issue.

The program itself seems to be degrading.
 
As soon as I finish this album (I hope SONAR allows me to finish it) I will reinstall Windows and if that does not fix SONAR's CONSTANT crashing I will be forced to find a new DAW.  Which would be sad as I have used Cakewalk since 1991.

Not sure what a RAM test is but I'll look into it today.  I will also check out the drivers for FR and make sure they are updated.
I will try anything to fix this.
There is NO pattern whatsoever to the crashing.  One day it will work fine (only crash twice) and the next day it just becomes unusable.
 
Last night I uninstalled/reinstalled SONAR with no results.
 
And the degrading continues, as now Melodyne doesn't work.  When the Fault Reporter comes up I see the word Melodyne in there, so obviously something is going on there.

Yeah, you shouldn't be having that happen to you. I was going to suggest uninstall/reinstall of Sonar  but since you've already done that, try doing the same with Melodyne. There's also a version 4 update you might consider.
 
Craig's advice on running a memory diagnostic is right on. In Windows 8.1 it's easy - at the start screen (or search) type "wmd". This is the Windows Memory Diagnostic. Run it and follow the prompts.
 
Next, I'd check the Windows Event Log to see if any hardware issues are being logged like disk errors or other hardware failures.  After that you might want to go into Windows Update, check the history and see if any updates were applied around the time you started experiencing issues. It wouldn't be the first time a patch of the OS hosed things up. If so, and I wouldn't go here lightly, there's usually a restore point created when an update is done that you can roll back too, BUT if you decide to go this route, backup any projects you've changed; you'll lose any changes since the restore point was created.
 
Honestly, I don't think you'll have to get that weird. Problems like this are almost always resolved with uninstall/reinstalls of something, be it drivers or specific software components.
 
Good luck!

Good Day,
 
I cant really help with your issue, but will say I just reluctantly tried using Vocalsync again yesterday, and it still had problem I had months ago, and why I don't use anymore, which is that as soon as I have tracks selected and try and move/align them it generates a high level noise signal that requires shutting down audio engine and/or global FX to mute, and then closing and restarting Sonar to stop noise generation.
Conversely, I've gone pretty well the whole month without Sonar crashing, (until using Vocalsync), from previous month which it was crashing at least 2 or 3 times a day. I had changed some Windows setting to include, always running as administrator; giving priority to back ground applications; and removing indexing of hard drive, perhaps a few other things, (I had found tips on ProTools website for its issues, so decided to try same, cant say for sure but seems to have helped). 
Still on Win7 on my DAW PC though, maybe Ill finally switch it to Win10 despite not liking interface, or change in general.
 
Best of luck, Cheers   

JohnEgan
Still on Win7 on my DAW PC though, maybe Ill finally switch it to Win10 despite not liking interface, or change in general.

I stayed on Windows 7 for as long as I could. After upgrading to Windows 10 I wish I had done it sooner.

Vocal-sync IMO only works on flat tracks, tracks that haven't been melodyned or audio-snapped, or probably on clips that have a plugin stuck in the clip.  If you have those, you gotta bounce them first (methinks) so they are just a wave file sitting in a clip.  Whether I am right or wrong, I've had no problem vocalsync-ing .... other than after vocal-syncing applying some minor trimming and/or fade-out as may be required to make a flawless match.
 
I don't have any problems under Windows 7, and plan on staying with that past 2020.  If you have Windows 8, I agree with folks above you should probably go to W10, but be advised that you are going to have to tweak a bunch of stuff to turn crap off that uses cpu.  The only thing that should be using your cpu should be Sonar, and that is probably why I don't have problems (other than stupid stuff like get blackout drunk and become Super Mixing Engineer, ta da, and destroy a whole sesson).  There is probably a How-to somewhere on this forum.  How to set up Win10, not get blackout drunk.  PM me if you need those instructions.

Well, after switching to Win 10 the crashing has pretty much stopped.
It still does once in a while when I shut down certain projects.
 
Suddenly Vocalsync works, but as MacFurse said I just make sure to "bounce to clip" after I use it.
Are there any alternatives to Vocalsync?
 
Oh, and I did reinstall SONAR and Melodyne.
Command Center doesn't make clear where Vocalsync is but I assume it reinstalled with SONAR.
 
Also, if anyone has those Win10 tweaks I would appreciate a link/list.
 
THANK YOU everyone for your great advice and help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!