Hi there, I've just tried installing Draftsight on Ubuntu 12.04 via the downloadable deb package. Upon installation, it fails and gives this:

(Reading database ... 172716 files and directories currently installed.)Unpacking dassault-systemes-draftsight (from .../jono/Downloads/draftSight.deb) ...No protocol specifiedNo protocol specified

(ShowLicence:3682): Gtk-WARNING **: cannot open display: :0.0dpkg: error processing /home/jono/Downloads/draftSight.deb (--install): subprocess new pre-installation script returned error exit status 1Errors were encountered while processing: /home/jono/Downloads/draftSight.deb

Any ideas?