[Mel Dupont]

When I ran into this error message while using Final Cut Express 4, I scrambled to get a fix in place to meet a deadline. The solution for me turned out to be installing the (not free) DivX for Mac.

I posted the full story here:

https://meldupont.com/2010/05/tech-tips-hard-drives-time-machine-divx-for-mac/

Hope it helps!

+ Mel