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When trying to restore data or performing a scan, I get the following error:

E3841 Unable to find session number, EC=Error session active

In the log file I see the following line:

[12/20 10:38:38 0ce8  1 TK        3472   6] FSD: FSD_ClientGotoSession(): Open session file failed JobID[3472] DeviceNumber[8] Session[1] MS=5

Backups are stored on a NAS, accessed by Windows share.

What is wrong?

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1 Answer

The problem was caused by wrong ACL settings on the NAS. It was the MS=5 part of the error message that guided me in that direction because error 5 is mostly security/ACL related.

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