Ok, I answer myself. I bring up the includes just before JobDefs and now it 
works perfectly

# Jobs and Clients Definitions
@/etc/Bacula/clients/salvasprod-fd.conf

JobDefs {
  Name = "DefinicionPorDefectoParaCopias"
  Type = Backup
  Level = Incremental
  Storage = FileSAN
  Messages = Standard
  Priority = 5
  Reschedule on error = yes
  Reschedule interval = 1 hour
  Reschedule times = 2
  Max Start Delay = 8 hours
}

Cheers
Ing. Reynier Pérez Mira

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