Upgrading from Debian 9 to Debian 10, binary format confusion

[conover@rahul.net (John Conover)]

I installed debian-live-10.1.0-amd64-xfce.iso from
https://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/

Programs compiled on Debian 9, Amd64, fail to execute, with a wrong
binary format error.[1]

Programs compiled on Debian 8, i386, execute fine.

Any help would be greatly appreciated,

    Thanks,

        John

[1] The Debian 9 machine was Amd64, Muli-Arch for legacy print driver
support. "dpkg --add-architecture i386" was run on the machine, and
the appropriate libraries were installed.

-- 

John Conover, conover@rahul.net, http://www.johncon.com/