Currently Being ModeratedFeb 9, 2013 3:17 PM (in response to phonebone)
It is more likely trying to tell you that you don't have sufficient free space on your hard drive. You need at least 20GB.
Currently Being ModeratedFeb 9, 2013 6:45 PM (in response to Klaus1)
I agree, and I tried moving it to a 1TB drive that is nearly empty.
Someone in another forum suggested relaunching iMovie, then instead of opening the movie you want to export, you right-click on it and select export in the Project Gallery. This obviates the need for iMovie to load your project into memory.
Worth a shot!