1. Add TH3 to a project and pick a patch.
2. Add AD2 to a project and drag out a midi clip for drums like 45 minutes
3. Add Rapture Pro to the project.
4. Play along until the drums drop out and keep playing a little beyond that...
 
System crashes.

TH2 or TH3?  (You name both).

Oops TH3.

Right now, I'm recording a single audio track with the same drum clip looped for an hour to see if AD2 by itself is the problem. <I was not able to crash it with only AD2.>

No TH3 or Rapture Pro.

It tends to freeze just after the drum loop runs out. Moments after.

Also the drum loop was way longer than fifteen minutes.

I assign midi input 2 channel 16 to AD2. Nothing is plugged into this input.
 
There is nothing in the mini-dumps folder...
%appdata%\Cakewalk\SONAR Platinum\MiniDumps\Plugins
 But that was also the case when TH3 was crashing Sonar before.
 
I've tried and tried, and can only reproduce when I'm deep in a lengthy groove and the drum track ends. Idk what's doing it, but it's happening repeatedly. I just can't repeat it when I want to.