I finally configure amanda but when I run amdump it returns the
following report:
These dumps were to tape Backup1.
The next tape Amanda expects to use is: Backup.

FAILURE AND STRANGE DUMP SUMMARY:
  192.168.0. /Documentos lev 0 FAILED [/sbin/dump returned 1]
  192.168.0. /Documentos lev 0 FAILED [dump to tape failed]


STATISTICS:
                          Total       Full      Daily
                        --------   --------   --------
Estimate Time (hrs:min)    0:00
Run Time (hrs:min)         0:00
Dump Time (hrs:min)        0:00       0:00       0:00
Output Size (meg)           0.0        0.0        0.0
Original Size (meg)         0.0        0.0        0.0
Avg Compressed Size (%)     --         --         -- 
Filesystems Dumped            0          0          0
Avg Dump Rate (k/s)         --         --         -- 

Tape Time (hrs:min)        0:00       0:00       0:00
Tape Size (meg)             0.0        0.0        0.0
Tape Used (%)               9.8        9.8        0.0
Filesystems Taped             1          1          0
Avg Tp Write Rate (k/s)    16.9       16.9        -- 

USAGE BY TAPE:
  Label         Time      Size      %    Nb
  Backup1       0:00       0.0    9.8     1


FAILED AND STRANGE DUMP DETAILS:

/-- 192.168.0. /Documentos lev 0 FAILED [/sbin/dump returned 1]
sendbackup: start [192.168.0.1:/Documentos level 0]
sendbackup: info BACKUP=/sbin/dump
sendbackup: info RECOVER_CMD=/usr/bin/gzip -dc |/sbin/restore -f... -
sendbackup: info COMPRESS_SUFFIX=.gz
sendbackup: info end
|   DUMP: You can't update the dumpdates file when dumping a subdirectory
|   DUMP: The ENTIRE dump is aborted.
sendbackup: error [/sbin/dump returned 1]
\--------


NOTES:
  planner: tapecycle (1) <= runspercycle (14)
  planner: Last full dump of 192.168.0.1:/Documentos on tape 
overwritten in 1 run.
  planner: disk 192.168.0.1:/Documentos, estimate of level 1 failed: -1.
  taper: tape Backup1 kb 64 fm 1 [OK]


DUMP SUMMARY:
                                     DUMPER STATS            TAPER STATS 
HOSTNAME     DISK        L ORIG-KB OUT-KB COMP% MMM:SS  KB/s MMM:SS  KB/s
-------------------------- --------------------------------- ------------
192.168.0.1  /Documentos 0 FAILED ---------------------------------------

(brought to you by Amanda version 2.4.4p4)
 I do not know why amanda returns that