Is a directory - ./data/backup/ (Errno::EISDIR)
/home/socodanet/www/socodanet/do-osan/hiki/db/flatfile.rb:67:in `read'
/home/socodanet/www/socodanet/do-osan/hiki/db/flatfile.rb:67:in `load_backup'
/home/socodanet/www/socodanet/do-osan/hiki/command.rb:329:in `cmd_diff'
/home/socodanet/www/socodanet/do-osan/hiki/command.rb:93:in `send'
/home/socodanet/www/socodanet/do-osan/hiki/command.rb:93:in `dispatch'
hiki.cgi:32
/home/socodanet/www/socodanet/do-osan/hiki/storage.rb:14:in `open_db'
hiki.cgi:30