I'm not sure why there were errors.
Every time I tried resuming analysis, the tracks, which were halfway through an SACD ISO, errored out.
I restarted Media Center and the tracks analyzed without error.
I've actually had a few issues like that crop up recently.
Sometimes Media Center is saying that my DAC doesn't support the format being played for any type of music I try to send it.
If I'm trying to play a 44.1kHz file for example, sometimes playing a file with a different sample rate like 48kHz will work, and as long as I don't stop playback, I can go back and play those 44.1kHz files.
If I stop playback though, MC gives me the same error about an unsupported format when I try to play those 44.1kHz files again.
Restart Media Center and playback works as normal. It's very strange.
I'll try to get a log file the next time it happens.