Spurious "more than one current_mirror" error

Hi,

I get an error I cannot explain.


I want to back up chatlogs from the Pidgin client, and what works
flawlessly is

rdiff-backup backup .purple /media/david/Backup Drive/.purple


I've written several folder names I want to back up (e.g. Desktop,
Documents...) into a file. Among them is also .purple.

As a terminal, I use fish.


for d in (cat /media/david/Backup Drive/backupdirs)

     rdiff-backup backup $d /media/david/Backup Drive/$d

end


works without a problem on several folders, also .thunderbird.

When the for loop comes to .purple, I get:


NOTE: Starting increment operation from source path .purple to
destination path /media/david/Backup Drive/.purple
ERROR: Either there is more than one current_mirror or the last backup
is not in the past. Aborting.
ERROR: Action backup failed on step run


There is only one current_mirror file in .purple/rdiff-backup-data, and
the last backup definitively is in the past.

As I said above, running one backup alone:

rdiff-backup backup .purple /media/david/Backup Drive/.purple

without the for loop happens without any problems.


I'm really, really, really at the end of my wits.


With the best regards,


David