Very long backup chains consisting of hundreds or thousands of incremental backups are problematic. Even when everything works they're inefficient. So if you backup very frequently (e.g., hourly cron job) we recommend changing the full backup frequency configured in /etc/tklbam/conf from 1M (one month) to 1W (one week) or below.
Otherwise you're going to get very long backup chains (720 volumes in a month) and may run into file descriptor limits on your system when you restore.
If you've already created such a backup, you can temporarily increase the file descriptor limit from 1024 to 65536 like this:
ulimit -n 65536 tklbam-restore 1