Aborting XFS copy - reason: Cannot allocate memory

[Luzbel <putabetis@xxxxxxxxx>]

I made a copy of my / partition with xfs_copy -d to a file on a XFS
filesystem. It worked without complains. Now, when I try to copy back
the data from the file to the partition I get:

root@slax:/mnt/hda3/luzbel/backup# xfs_copy -d archlinux.partition /dev/hda2
Error initializing wbuf 0
Aborting XFS copy - reason:  Cannot allocate memory
Check logfile "/var/tmp/xfs_copy.log.pn0zp0" for more details
root@slax:/mnt/hda3/luzbel/backup# cat /var/tmp/xfs_copy.log.pn0zp0
Error initializing wbuf 0
Aborting XFS copy - reason:  Cannot allocate memory
root@slax:/mnt/hda3/luzbel/backup#

Partition /dev/hda2 is unmount and /dev/hda3 is mounted, of course.

You got any idea on why this is happening? If you need me to provide
extra info, instruct me.

Thank you very much.