It looks like you're using FileVault. What I'd suggest for you is to create a non-FileVault account to do backups from. Log out of the FV account (which'll allow its special image to be put away cleanly), and log into the special backup account.

At that point, the backup should work fine. (Note that you might need to do *one* erase then copy to clean up from the failure.)

Sounds like a good plan. I'll try it. Why was I able to do clones without any problem *before* registering the software?

Thanks for the response.

I don't know: extension of files like this aren't entirely deterministic, and it's the active extension that causes this kind of problem. Without things like the log running inside the FileVault volume, that can't happen, so it should work.

Your suggestion worked. Thanks for the help!
:)

Great. Happy to help!