I'm getting the Quicktime -50 error from Compressor after I exported the movie file. Thoughts?

[oxband]

I exported a film from FCP 7 and when I tried to compress the file in Compressor, I got the dreaded -50 error.

Any advice? Almost all the advice I've seen online is what to do so you can export to Compressor from the program...but in my case, I already have an exported movie file I'm trying to compress. Any ideas?

Thanks!

 

[kohlson]

Are you leaving FCP up while compressor is doing its thing? There seem to be several potential causes. Can you provide more details:
https://discussions.apple.com/thread/4260237?tstart=0

 

[oxband]

No, I have FCP 7 closed at the time