I would LOVE some help with this problem. I'm trying to play a video file on my mac and get the following error: The movie could not be opened. Operation could not be completed. (OSStatus error -1.) The files run on a PC and ON EVERYONE ELSES MAC!!! For a couple of years these files ran on my mac also, but one day stopped and I have no idea why. Here's the details: Mac running 10.5.6. Quicktime Pro 7.6. Perian 1.1.3 and Flip4Mac 126.96.36.199 are installed. Also will not open with newest WMP on my computer. It will open with VLC, but because of the number of files I need to work with, transcoding each file into an MPEG-4 would be too cumbersome. The file is CRAM HELP! Thanks so much for any help.