Failed to call RPC function 'Vss.FinishSnapshot'
Challenge
In the guest helper logs you will see the below occur before Veeam sends the VSSControl: FinishSnapshot started command in the task log.
18/10/2018 22:39:41 2688 INFO RPC: KeepSnapshotEx. Ok.
18/10/2018 23:00:00 21004 WARN Snapshot timeout occurred.
Cause
Solution
The default value is 1200 so attempt doubling that value when creating the key.
VSSGuestSnapshotTimeout
Type: REG_DWORD
Default value: 1200 (in seconds)
Description: Found in job log as "VSSControl: KeepSnapshot started, ttl 1200 sec". Registry setting was added in v9 update 1. Prior to that, this timeout was hard-coded to 600 seconds. This registry key goes to the Veeam Server
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