[h] Unable to open server file list, C:\Users\username\temp\ Predefined@- \index\index.b2b is in use by another application.
This error can happen if the index.b2b file is open by another session of the backup software and a backup or restore are running.
It is possible for 2 different users to logon with different Windows profiles and lock the file for the other.
Log all users off the server and try again.
It that doesn’t resolve the issue, reboot the server or delete C:\Users\username\temp The folder will be recreated when you next open our backup software on the affected device.