Have just started working on FCP 7. Am new to FCP. Just getting up to speed and all going well, three camera views from a business event on timeline and dropping in jpeg images (resized from powerpoint presentation) Suddenly error message after doing Command S to save - "Operation not allowed" this has happened twice within an hour. Colleague tried Command 8 to see where media going but FCP then quit and I lost the last hour work. Now it has happened again. Eek!