Hello,
I would say that you are not obliged to use the XMPie barcode fonts,
but at least fonts whose encoding is fully compliant with the
character strings which the XMPie barcode functions produce (not sure
that such a configuration - using barcode fonts not provided by XMPie
- would be officially supported, but it might work).
To check which characters are produced by the XMPie barcode functions,
you could duplicate your ADOR object, change it from "Text with Style"
to "Text Only", then insert it into an InDesign text block with a
"standard" font (such as Arial, etc.).
But according to the User Manual, the Barcode font kit (which contains
20 TTF files) is expected to be found on the uDirect CDROM.
If you can no longer find you CD, you could ask a copy to your Xerox/
XMPie representative.
The only barcode-related issues I ever ran into were related in
InDesign changing some characters produced by the XMPie functions
(quotes, apostrophes, etc.) to other typographical characters. There
are workarounds for these cases as well.
Bill