Sidechain plugin crashes Sonar Professional

I finally got around to trying sidechain compression from vocal bus to guitar bus to duck the guitars a little.  I did a little research and saw that the native Sonitus:fx compressor has sidechain capability so I tried that.  I added the compressor on the guitar bus, inserted a send to it on the vocal bus.  As soon as I hit play, the audio glitched then cut out.  I hit stop then play again but it remained silent, no audio at all.  Then Sonar crashed.  I restarted Sonar and tried this again but it immediately crashed this time.  I also tried this with the Sonitus:fx gate (also has sidechain capability), but same results.
 
I then downloaded a demo of the Waves C6 multiband comp to test, still getting crashes.  However, every few times I tried it again, Sonar didn't crash.
 
I know there is sidechain capability because I watched a couple demos of it on Youtube (it's how I discovered Sonitus:fx was a sidechain option).  What might be causing this, a plugin incompatibility or something?
 
I have Windows 10 64-bit, 3.50 GHz AMD FX 8-core CPU, 8 GB RAM, and Sonar version 21.13.00 BUILD 32 Newburyport - x64.

MagicMike
I've had this issue too. 
 
I just expect it to happen some of the time so before I insert the send to the sidechain I hit CTRL-S to save ;-)

lol, ctrl-s is always the key!!!
 
Ok, thanks for the feedback and sanity check confirming that I'm not the only one having an issue.  Would you say this is a regular issue or infrequent for you?  For me it was crashing the majority of the time I tried to use it last night... well, it crashed EVERY time I tried to use Sonitus, but then just the majority of the time with the Waves plugin.
 
BTW, when it worked with the Waves C6, I loved the way it helped the vocal track cut through every so subtly.

I've been unable to get a single sidechain compression send to work. Causes an immediate crash as soon as I click play. Doesn't seem to matter what compressor I try.

As others have said, it works fine on a fresh project but crashes a more developed file. And it's later when I'm in the mixing stage that I'm usually setting up a sidechain. Other sends are no problem, but sidechains crash n burn. I really like Sonar, but the inability to sidechain is a big detrament.

Drizzit
I've been unable to get a single sidechain compression send to work. Causes an immediate crash as soon as I click play. Doesn't seem to matter what compressor I try.

I've had this problem now for a while too. I have a workaround that allows the side chain to work, but it's a pain. Do everything your doing, but instead of hitting play, hit save. Then play, which will crash Sonar. Re open Sonar and your project, and your away. But I still get the odd audio glitch, or audio engine dropout, after re-opening the project, but it doesn't crash Sonar, and rights itself again quickly. 
 
My system is my DAW only, fast and well maintained, so I don't think it's to do with system performance. I wish I could find a fix.....
 
 

Thought I would bump this issue. Last side chain attempt immediately crashed on “play.” Hardly any CPU load. No plugs except for the side chain attempt. Working off an SSD with 32 gigs of RAM. I don’t get it.

Lots of smarts on this forum. Hello? Bueller...? Bueller...? :-)

No. Not mine, anyway. All 64 bit

It works fine for me in a project where I'm using the lead vocal to sidechain two compressors, one on a softsynth harpsichord and the other on the Guitars bus. The project has about 20 tracks and numerous plug-in effects and Vi's.
 
One thing I notice is that most of the people getting the crashes seem to still be running SONAR (according to their sigs).
 
I'm running the latest version of Cakewalk by BandLab and it's always just worked for me, so anyone having trouble with sidechaining or any other instability who's still running SONAR might try installing Cakewalk and see if it handles it better.