Restore SQL Server Database : error 3078 (HP data protector Express)

[MARCELLIN]

Hello, I've made a backup of an SQL Server 2005 database with HP Data protector. I've delete some rows to test restore function. I've done a restore job, select the destination database and the physical tape. After running 1mn30, job is exiting, logs give me this error :
Erreur 3078: Échec de la commande SQL Write Data

Translate ==> Error 3078 : Command SQL Write Data have fail


What is this error ? How can I restore the database ? In other case, where can I find more information about Hp data protector express error code ?

Regards.