Not sure why, but 5 of my 10 courses return 'error' after automated backups. On the log page, 4 of them stop after 'logs' and one stops after 'caluculating user files'. Any ideas on what this might be? If I back them up manually, there's no problem at all.
This is on a windows system running apache from the moodle windows installer package. Cron jobs are currently completing, but I get an odd error message (see this thread)