Hi all,
 
I came back after Thanksgiving to find that my Sonar install suddenly doesn't load. I don't think I changed anything, except update Melodyne sometime in the last week. I don't recall if I used Sonar since doing the update. 
 
Anyway, if I click on the program shortcut, the mouse cursor whirls once, then nothing. The app doesn't even execute long enough to appear in task manager. 
 
I have tried a roll back to 09.2016, an uninstall/reinstall, and a full uninstall and fresh download of the installer executable through command center. Nothing seems to work. 
 
I also tried booting in safe mode to see if it was driver issues, but the problem is the same. 
 
I also tried disabling all the VST folders by renaming them, to see if it was a plugin issue, but nothing changed. 
I get no errors, warnings, nothing, so it's very hard to debug. 
 
Has anyone else seen this?
 
Chris

I know this might sound obvious, but have you power cycled your PC.  It's possible that an instance of SONARPLT.EXE process is running in the background.  This would prevent Sonar from running (it does on my system anyway).

To check this, right click on your Windows task bar and select "Open Task Manager" and check the "processes" tab

If you have power cycled your PC and Sonar will still not start, try temporarily disabling your antivirus or antimalware software (if present).  Maybe Sonar is being incorrectly deemed as malware and preventing it from running.  If doing this allows Sonar to run, then you might want to add the Sonar Installation folder as an exception.

Of course, it goes without saying, make sure you have all your windows updates installed and drivers updated.

Incredibly difficult to make any diagnosis with out some basic knowledge of your set up.
In other words... Your Specs man.
What are you using for an AI, PC, OS ? You would benefit from putting these in your signature for future questions.
 
There is a possibility your Anti Virus may be the culprit.
Make an exception for Sonar and the plug in manager itself in your AV exclusion settings.

Thanks for the quick replies. I tried rebooting many times, and also into safemode. As I mentioned above, Sonar never even appears in the task manager when I click it, fails to get a PID in less than the update time of the task manager list. I also tried the anti-virus suggestion, thanks for that. I only run Windows Defender, which I disabled. But no joy there.
 
Here are my specs: Dell XPS 13 Touch (9333): i7-4500U, 8GB RAM, 256GB SSD, Windows 10 Pro always patched // Sonar Producer, Melodyne 4.1, Addictive Drums & Keys, Z3TA+2, Dim Pro // FL Studio Producer 12.4 all plugins + some FL VSTIs in Sonar // FL ASIO driver with either built-in soundcard or Sonoma Wire Works StudioJack Mini // Bittorrent Sync backup to NAS. 
 
My next steps are to remove melodyne, then Addictive Drums. I'd love any other suggestions. 
 
Thanks!
Chris

Boot SONAR in safemode...Not the PC. Do this by holding SHIFT while double-clicking the Sonar app. You will then be presented with options to start Sonar with/without each plugin or other configuration variables. Disable one or all until you find which is crashing your app.

Also, make certain your harddrive does not haveany errors. Right-click the drive icon, select proprties, tools, and check for errors.

Lastly, make sure the project you are trying to open has a compatible sample rate with your audio interface. You can run Sonar without opening a project and change your audio card prefernces, if you have to, to match your audio interface...

That's all I can think of, without any more details...

Thanks, I just tried the Sonar safemode now and it is no different. If I click the SONARPLT.EXE file the Win 10 waiting circle pops up for about 0.5 seconds the goes away, and absolutely nothing else happens. Holding down shift doesn't do anything different -- the app doesn't progress in loading far enough to even pop up the dialog. I remember using it before so I know what I am looking for. The EXE is simply dead. This is my 2nd full install of Sonar in 24 hours and it's still dead. It's not giving me any data whatsoever to tell me what's wrong. No loading, no errors, no process ID, nothing.
 
BTW, I am using the 64-bit version since my OS is 64bit. I could try installing the 32bit version...
 
Scanned my SSD, no errors =/ 
 
I also tried rolling back from 2016.10 to 2016.09 and I get this intriguing error: 

 
When I tried this yesterday, %1 was "iZotope_Radius_x64.dll" but i have since reinstalled twice, and now it is giving me the unpopulated wildcard instead. I did a whole google search for "iZotope_Radius_x64.dll" and learned what it was (cool, introduced in 2006 for realtime stretching) but no evidence of others with issues with the file. 
 

Sometimes its not enough to disable your AV. Exclude it instead.
I also recommend running Windows update as Melodyne Requires up to date Runtime Library's for C++ .
Make sure you have them installed.

Thanks again for the ongoing help, I added SONARPLT.EXE as an exception in WinDefender. No change. 
 
I ran windows update and all I got was some WinDefender AV definition updates, but checking installed apps I see that I have a C++ version dated today, and another dated October:

so all good on that front. 

Do any other exes run?
 

bitman
Do any other exes run?

Yes, everything else as far as I can tell. FL Studio works fine, the Addictive Drums Standalone, VLC Media Player, MS Word, and Google Chrome on which I am writing this now.