Sure, I just put the whole response from the apple forums where I posted the same question. It was corrupt media in the sequence that was messing the whole system up. I simply just took it out and it worked.
“You likely have some media that’s corrupt and that is what is stopping the export. The LHe card is another thing altogether…. you might call AJA about that. Try moving your media to another folder on the same hard drive, then open the project and reconnect the media files a few at a time until you see a crash or warning, or something that lets you know that the media needs recapturing. If this fails to fix you up, I’d suggest a clean erase and install of OS X, then FCS on top of that on a fresh startup disk. If you’ve not done this in a while, it’s likely time anyway to do it.
Jerry ”