I currently have Retrospect 11.5 Desktop (formerly Professional). I use it to back up three (currently) PCs to four backup sets, each on a 3 TB hard disk, using one of the backup sets each day. The network is a dedicated gigabit Ethernet switch. What's the value to me of upgrading to Version 12? The new features don't seem really applicable to me. There are quite a few bug fixes, but I don't see why I should have to pay for an upgrade just to get fixes.
The main problem that I have is frequent occurrences of backups bombing with thousands of "-1101 File or Folder Not Found" errors:
...
[*] stfiDoBackupOne: error -1101 (file/directory not found) on C:\Windows\WinSxS\x86_wwf-system.workflow.runtime_31bf3856ad364e35_10.0.14393.0_none_3670ad90fe5c2d0f\. [*] and 34,579 others [*] stfiWaitForBackupDone: operation terminated, error -1101 (file/directory not found) Trouble reading files, error -1101 (file/directory not found) 3/24/2017 6:27:38 AM: Trouble copying folders, error -1101 (file/directory not found) ddex=50,848
It occurs both on the "server" and the clients, with no obvious pattern. Usually rerunning the backup works, but that is a pain and makes Retrospect less than fully automated. I don't see a fix for this in the list of Version 12 fixes.