I've been using Nebula Free waiting for 64 bit. It was working okay but hadn't used it for a month or so. In the meantime I installed several plugins including Slate VCC and a couple of Brainworx (Plugin Alliance) Stillwell Rocket and maybe a few others.
When I tried to use Nebula the other day, it worked fine at first but when I closed the project and tried to open it again, Reaper's bridge froze. I force quit the bridge and deleted the single instance of Nebula and everything worked again.
I tried doing some fresh installs of Nebula Free and it works until I close the project or delete and try and open another instance of Nebula. Then, the bridge locks up the instant I hit play. Also did a fresh install of Reaper but that did nothing. I'm using a MacPro 6 core 3.3G/24G ram and Snow Leopard.
Thanks for the reply. I found that it was a problem with my settings in Reaper and not an issue with Nebula. I'm not sure what the exact setting was since I started from scratch and redid all my preferences.