When backing up some btrieve database files on a buffalo nas, using retrospect 10.1 mac (open file backup NOT running), I successfully back up several hundred of these files every night from a single directory, but I have a handful of important files that won't back up, giving me "can't read. error -1017 insufficient permissions". I know 3 of these files ARE open, and I don't expect them to be backed up. I've used Retrospect for 20 years and know there are several reasons for this error and I've tracked through them. These files are not open, not in use, not locked, and their ownership and permissions setup is identical to the several hundred other files in that directory that do back up nightly without a problem. Any ideas?