Interesting. I worked with a catanya project for hours yesterday, no issue. However it only had one Catanya in it.
I seems that I can make the error happen pretty consistently when I have more than 1 catanya in the synth rack.
BTW - I do not have to use task manager to quit Sonar. I just keep acknowledging the access violation about 10 times and then I can click the red X and close the window (you have to be quick !). Each time I hit enter (okay) I notice the hex address of the violation changes. Of course once this happens, anytime I open the catanya window the access violation happens.
If I had to guess, this seems to be graphic process related. I say this because sometimes catanya is fine until you roll the mouse over the window. However this never happened before the last Sonar patch. Nor does it happen with any other VSTi. This is going to be nasty one I think to find the culprit.
I will keep trying things.
JR