There was a bug related to 'with reference' in the exporter at one point. Be sure you have the most current download of the export plugin from the Abvent web site.
It is unnecessary anyway, though. Just export your model from AC, and then from the File menu in Artlantis, load the reference file. See screenshot.
Cheers,
Karl
One of the forum moderators
AC 27 USA and earlier • macOS Ventura 13.6.9, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB