Hi guys, this is my first time using iMovie, and I'm kinda excited about it. However, just as I tried to export a 720p clip which only lasts for under 5 minutes, it either says error -108 or error -50. I tried all the resolutions, and only the mobile (least) resolution worked. I found out that the remaining RAM started plummeting when I hit the export button. I have a brand new MacBook Pro 13" and about 400GB of free HDD space, no other applications were running at that point of time. I tried cleaning caches, resetting iPhoto cache, deleting iMovie cache file, clean rebooting, repaired permissions and HDD, nothing worked. What just happened? Does it mean I need a new RAM upgrade??? My model identifier is a Macbook Pro 8,1. And the system have about 2.51GB of RAM free. (No other applications were running) Now what to do??? I certainly do not want to reinstall the system, but at least I have a rather up-to-date backup. Was it because of the RAM free space???