Hi,
I have the same problem with some of my defined jobs. Sometimes it fails, 
sometimes not. I run the failed jobs "by hand" and it works OK.
Here's the log:

02-jul 01:22 bacula.intranet.visualtis.com JobId 914: Fatal error:
     Storage daemon didn't accept Device "BackupsWeekly-OVH" command.
02-jul 01:22 bacula.intranet.visualtis.com JobId 914: Error: Bacula 
bacula.intranet.visualtis.com 5.2.6 (21Feb12):
  Build OS:               x86_64-pc-linux-gnu ubuntu 14.04
  JobId:                  914
  Job:                    BackupTurismoDeMurcia.2015-07-02_01.00.00_21
  Backup Level:           Incremental, since=2015-07-01 01:00:05
  Client:                 "turismodemurcia.com-fd" 5.2.6 (21Feb12) 
x86_64-pc-linux-gnu,ubuntu,14.04
  FileSet:                "TurismoDeMurciaFiles" 2015-06-29 18:49:50
  Pool:                   "OVHPool" (From Job resource)
  Catalog:                "MyCatalog" (From Client resource)
  Storage:                "WeeklyStorage-OVH" (From Pool resource)
  Scheduled time:         02-jul-2015 01:00:00
  Start time:             02-jul-2015 01:00:02
  End time:               02-jul-2015 01:22:48
  Elapsed time:           22 mins 46 secs
  Priority:               10
  FD Files Written:       0
  SD Files Written:       0
  FD Bytes Written:       0 (0 B)
  SD Bytes Written:       0 (0 B)
  Rate:                   0.0 KB/s
  Software Compression:   None
  VSS:                    no
  Encryption:             no
  Accurate:               no
  Volume name(s):
  Volume Session Id:      12
  Volume Session Time:    1435571119
  Last Volume Bytes:      1 (1 B)
  Non-fatal FD errors:    1
  SD Errors:              0
  FD termination status:
  SD termination status:
  Termination:            *** Backup Error ***


Did you find any solution?


Please help!

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