"Error setting permissions: Operation not permitted" during backup

[ludo33200]

directory selection to backup
/home
/etc/tools
directories to be ignored
Trash
~/Telechargements (using french version) should be something like ~/Downloads ?

backup destination set up to local directory /mnt/home-usb-hd/ubuntu_backup : this is an external usb hard disk
/mnt$ ls -l
total 36
drwxr-xr-x 2 root root 4096 mai 15 22:27 home-smb-hd
drwxrwxrwx 23 root root 32768 janv. 1 1970 home-usb-hd

hard disk is mounted at startup withing /etc/fstab
# External USB drive
UUID=18F5-2038 /mnt/home-usb-hd vfat user,auto,fmask=0111,dmask=0000

after boot /mnt/home-usb-hd can be browsed, and using a term i'm able to create files using command like cat > hello.txt
/mnt/home-usb-hd/ubuntu_backup also exists

schedule : each week
keep at least 6 months
------
$ lsb_release -d
Description: Ubuntu 14.04.1 LTS

$ dpkg-query -W deja-dup duplicity
deja-dup 30.0-0ubuntu4
duplicity 0.6.23-1ubuntu4.1

$ gsettings list-recursively org.gnome.DejaDup > /tmp/deja-dup.gsettings
ludovic@ludovic-Inspiron-One-2310:~$ cat gsettings list-recursively org.gnome.DejaDup > /tmp/deja-dup.gsettings
cat: gsettings: Aucun fichier ou dossier de ce type
cat: list-recursively: Aucun fichier ou dossier de ce type
cat: org.gnome.DejaDup: Aucun fichier ou dossier de ce type

oops... something is missing ?
running DEJA_DUP_DEBUG=1 deja-dup --backup | tail -n 1000 > /tmp/deja-dup.log
reproduced bug

$ ls -l
total 52
-rw-rw-r-- 1 ludovic ludovic 0 juil. 31 21:38 deja-dup.gsettings
-rw-rw-r-- 1 ludovic ludovic 38336 juil. 31 21:48 deja-dup.log
drwx------ 2 ludovic ludovic 4096 janv. 1 1970 orbit-ludovic
drwx------ 3 ludovic ludovic 4096 juil. 31 21:39 sni-qt_spotify_6779-BcqifS
drwx------ 2 ludovic ludovic 4096 juil. 31 19:27 ssh-DTvCOBjq2jSq
-rw-rw-r-- 1 ludovic ludovic 0 juil. 31 19:27 unity_support_test.0

/tmp/deja-dup.log will be added to this report

cd /mnt/home-usb-hd/ubuntu_backup; ls -ltr
-rw-rw-rw- 1 root root 42134104 juil. 25 17:43 duplicity-inc.20140718T210903Z.to.20140725T153906Z.vol17.difftar.gpg
-rw-rw-rw- 1 root root 9972670 juil. 25 17:43 duplicity-new-signatures.20140718T210903Z.to.20140725T153906Z.sigtar.gpg
-rw-rw-rw- 1 root root 990 juil. 25 17:43 duplicity-inc.20140718T210903Z.to.20140725T153906Z.manifest.gpg
-rw-rw-rw- 1 root root 2 juil. 31 19:50 test.txt
-rw-rw-rw- 1 root root 10527973 juil. 31 21:47 duplicity-inc.20140725T153906Z.to.20140731T194554Z.vol1.difftar.gpg

[Michael Terry (mterry)]

I think this should be fixed with 42.2, which now looks at /etc/fatal and mounts the target drive if necessary.