v2icreate Exit Codes?

Hello, we've been using SSR 2011 for a little while to backup some of our machines. When the backup succeeds, we get a return (exit) code of "0". What I'm wondering is what other exit codes we might encounter? For whatever reason we've recently seen a rash of backup failures that we'd like to try to isolate. If there are any exit codes, other than zero, we would really appreciate knowing about them.

Thanks,

-Mike