I got the "error unknown file" - which sent me to the vault. I'm working in an office configured by an IT not a post-production person and don't have the big picture on the network volumes I'm working with (but will inquire). When I went to the vault I see all the copies are... or think they are Final Cut Express files, I'm 99% sure they are not really. Yet when I drag a copied file from the vault and place it in the folder that had the project file that was not updating.. it open in FCP7 but everything is unlinked.
I know now to to a "save as" to work around the "error unknown file" msg but why is the vault apparently making Final Cut Express icons and why would all the media be off line in the above situation?
why that is, I have no idea. You can relink. There is also a good program - from digital rebellion. A must for every FCP user. Did you try the obvious - trash preferences and repair permissions in OSX?
Perhaps that helps. With digital rebellion you can repair corrupt FCP project files,
Mac pro 8core
several raid systems