by Ken Task.
Turn off automatted backups until this is resolved. When turning it back on, think that version of Moodle allowed op to send backups to a designated directory of op making. Do that.
If that query didn't show the course in question, probably due to the 32 bit version of PHP. Backup failed so clean up the moodledata/temp/backup/ directories again.
Now to next response ...
'spirit of sharing', Ken