Thanks Alexander. That makes one part of the move to a new system easier.

This problem is definitely NOT a Cloudberry problem.

For people who come upon similar problems later: Backups from one system on a LAN to another, and for that matter simple file access from one system on a LAN to another, require the ROUTER to also have VPN software matching the end points. That was the "something simple" I missed. Each of the VPN service providers, NordVPN, ExpressVPN, etc. has software for many different routers.

If you can't install VPN software on your router (for example those routers owned by ISPs), the alternative is to disconnect both ends of a backup process for the time needed.

THANKS David for attempting to help.

... and yes, backup with version 7 of Cloudberry works perfectly when each end of that VPN tunnel is disconnected.

THANKS David.
Just created the logs and got a reply notifying me of case #00050112.

I'm pretty sure that I've been on 7.0 for awhile, but will shut off the VPN on both systems tonight just to confirm.
Appreciate the help!
P.S.I have been getting a few "try this" and "try that" from Nord. No joy yet.
P.P.S You'll see that my copy of Cloudberry is "maintenance expired." That's because it worked so well for years, a fine product. I'll understand if that limits formal support.

Success. Thanks again.

THANKS Matt!
Recreating the db makes sense. It was the correct sequence I was missing. Will do this evening, after completing other home repair tasks. :)

Much appreciated!

PERFECT!
I'll watch for it. Thanks Doug.

OK. Makes sense.

Thanks again.

Thanks Doug.
Sounds just like what I want. But, how?
I'm using the simple CB Backup Desktop Edition and haven't found a way to specify the actions. Maybe they're hiding someplace I haven't found yet.