Hmm. I have plenty of space and still get the error often when I first run the prog because often I save in shared space-- so I just save the file in the large drive first. And then render. I suppose I should save the file anyway, but I'm the reckless sort. I'm running XP on a laptop 40G There's enough room for now, but I have my 120 firewire waiting to be installed because There's Never enough space!!! I haven't had to try anything else yet. Cross fingers. Emily