hi, i just installed (X3b 64bit), and i was opening an old project (X2 32) who was freezing at startup.
so, sonar wasnt responding, i click on it and end it. and reopen Sonar.
all is good.
i try to reopen that old project with "shift", to see what plugin is causing that freeze, but before i find it, i had to freeze sonar about 10 times (end it and reopen) all was good.
but now when it freeze, i can't terminate it anymore, even by killing it with task manager.
i tried to kill bitbridge and all other processes who could cause that other problem. but still nothing to do.
he wont terminate in the task manager, so i can't reopen Sonar. i have always to reboot each time.  
any idea? ty

Install X3E for starters and update your audio interface drivers and firmware to the latest.

Then do a VST reset followed by a rescan.
https://www.cakewalk.com/...ommended-for-Upgraders

I also recommend running windows update several times inc optional updates.

If the situation persists remove your 32 bit plugins from the VST path, and then add them one by one until you find the problem plugin.

You might also want to check for updates for your plugins.

You could also try running Sonar as administrator (or not running it as administrator if you are already doing this).

Thanks.

Update to X3e before using X3. http://www.cakewalk.com/Support/Knowledge-Base/2007013361/SONAR-X3e-Update then do this http://www.cakewalk.com/S...ommended-for-Upgraders

i use a profire 2626.
occasionally this will happen to me.
No need to restart, just power the profire off, then on again.
It seems to "release" sonare.exe

Yup on cycling the interface - in some situations, it seems to be about the only thing short of a reboot that frees up resources when that happens.
 
It's been that way for quite some time, meaning it spans multiple releases of Sonar, though I do not know if it is a Sonar thing, a Windows thing, an interface thing, or what.
 
I do know that many many folks have had WAY better stability once they moved to either switch over to all 64-bit third-party plugins, or at least convert/eliminate as many 32-bit ones as possible from use in 64-bit Sonar.
 
I think also that if you are having trouble opening old 32-bit projects in 64-bit Sonar, that it would benefit you to install a 32-bit X3e, for purposes of being able to open those project up to either export things, or freeze tracks, or make whatever changes needed to be able to get them working in 64-bit Sonar.
 
Your 32-bit projects should be able to open in 32-bit Sonar, if the issues are something to do with them trying to run in 64-bit fashion.
 
Bob Bone