Whew? Windows 7 64 bit giving you USB issues? You're sure you have the instruments linked to the Argyll LibUSB driver, and not X-Rite's? Did you look into Computer - Manage - Devices? Roger From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx] On Behalf Of nino@xxxxxxxx Sent: 20 juin 2010 09:23 To: argyllcms@xxxxxxxxxxxxx Subject: [argyllcms] Hi, I am trying to run Argyll, but the communication port of my device, a DTP94b, is not found when I try dispcal (Under -c listno I get ** No ports found **). I uninstalled the device completely before installing it from scratch with the Argyll driver for win7 64bit. Didn't help. thanks in advance for any help nino