There should be an option to disable the messages 81:76 and 81:77 from the sessions. Most of the cases are temporary files or files that customer knows that is not reachable.
I think that a variable in global or omnirc should work.
Messages are like this:
[Minor] From: VBDA@clientname "/var" Time: 21/12/2019 9:05:54 PM
Cannot open: ( Text file busy) => not backed up.
[Minor] From: VBDA@clientname "clientname [/]" Time: 26/12/2019 12:01:39 AM
Cannot perform stat(): ( No such file or directory) => not backed up.