Hi Dave, thanks for checking into this. Did what you said, and the exact same thing happens. I have our media on a separate internal drive from the OS. Changed the output folder to the same folder as the source media. Same IPC port error. Then I did a straight up render of the project into an HDV format, stored that file on my primary C: drive, on the desktop, then created a new project, and dropped that render into the timeline, and tried to make a BluRay from that. Exact same error message. I’m stumped, and getting kind of frustrated. Any ideas?