Pascal de Bruijn wrote: > I'm wondering whether this has anything to do with which version of libusb > argyll has been built against (which is 1.0.17 on ubuntu 14.04). Hi, ArgyllCMS hasn't used libusb since V1.6.0. It's possible to build it to use the old Argyll libusb, but I don't test it at all. At some stage I'll remove even that. So if you are building using exactly the same source code, it seem like a puzzle. I have fixed a couple of bugs in the USB code to do with timeouts, that particularly affected the DTP94 - you may want to build <file:///D:/usr/graeme/www.argyllcms.com/Argyll_dev_src.zip> and see if it behaves any differently. (Note that colprof and other code has some issues with that source, so you probably just want to use the instrument related executables.) Graeme Gill.