SmartDisk deduplicator reports "Failed to open file" (4046775)

Date: Jun 11
Product & Version: SmartDisk
OS Version:
Module & Version:
Application version:

Symptoms:
Deduplicator trace has many ocurrences of these errors;
Failed to open file '\\?\E:\SmartDisk\diskmanager\stage\diskmanager\data\01000000c710914d9f148bb798060000730e0900'
Failed to deduplicate URI 'NVBU/server/BACKUP/indices/8c33010a68ba8f4dc35400009c0900002e000000-00000033-00000003-0001-0000_0c6ea8c0fa0b914d4d0500001417000000000000' Cookie 'NVBU_server_BACKUP_indices_8c33010a68ba8f4dc35400009c0900002e000000-00000033-00000003-0001-0000_0c6ea8c0fa0b914d4d0500001417000000000000' : Failed to open Data Section '\\?\E:\SmartDisk\diskmanager\stage\diskmanager\data\01000000c710914d9f148bb798060000730e0900'

On checking, the disk index (the URI points the the actual disk index file) exists but the data (mentioned in the error) does not. The data segment is no longer on disk but we have an index entry for it.