i get the above error warning when trying to remove files from “my safe files” list. the actual files are not on the disk any longer. I get the same error when using “purge”, i. e. the purge command finds those entries (with missing original file) but after hitting o.k. to delete the entries, the error warning pops up.
Sometimes a reboot fixes these little annoyances. If you are still having problems with it give us your system specs and what security apps you are running so that we can get this working for you.