[chris brown]

I ran into the same issue. I am building blue ray 50gb disk. I have one main motion menu and 30 motion submenus. I tried 2 things one of which fixed the issue. I initially tried to change the main motion asset to a different asset in the project and then Encore froze up. After closing out and re-opening, I then deleted the submenu that had that asset I tried to use for the main menu, and I also cleared some space on my C drive. After doing both, the issue resolved. Given that there were 31 different menu assets, I think it unlikely that I just happened to pick the correct one that had the issue, more likely it was a hard drive space issue, but who knows??