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Deduplication restore fails with errors E3717, AE0084, E3713

Deduplication restore fails with errors E3717, AE0084, E3713

Deduplication restore fails with errors E3717, AE0084, E3713


I hope someone here can help me with this issue.
We're running Arcserve Backup version 16.0.
Backups are being stored on a deduplication device (QNAP NAS).
On sunday a full backup runs and all the other days are incrementals.
Most of the files can be restored, however some of the directories fail with the errors mentioned above.
When I browse the sessions I can see all data. Also the backups are all marked as "Finished", without errors.
Thanks in advance!

Error specifications:

E3717 Unable to go to cluster. (CLUSTER=<number>, EC=Deduplication device internal error.)
AE0084 Failed to read dta from media. CMD=5 RC=-1
E3713 Unable to read from media. (MEDIA=NAS, EC=Deduplication device internal error.)

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