[BackupPC-users] "Exponential expiring incremental backups" with IncrKeepCnt?

[Christian N. <chr...@me...>]

Hi there,
 
I'm recently trying to replace our only hard-links based backup solution
(snapback) by something more advanced like BackupPC. I got really far, but
now there is one thing I don't understand. 
 
The documentation mentions exponential expiring incremental backups
(http://backuppc.sourceforge.net/faq/BackupPC.html#backup_basics): "BackupPC
can also be configured to keep a certain number of incremental backups, and
to keep a smaller number of very old incremental backups."
 
But as soon as I try to enter an array for IncrKeepCnt just as it is
described for FullKeepCnt
(http://backuppc.sourceforge.net/faq/BackupPC.html#what_to_backup_and_when_t
o_do_it) I get an error message saying that "IncrKeepCnt must be an
integer".
 
Are "exponential expiring incremental backups" supported? If not, is there a
reason behind it?

Thanks a lot for answers,
christian