Jason Yau wrote: > I'm getting "Instrument Access Failed." Any help would be appreciated. > usb_open_port: open port 'usb417: (Xrite DTP94)' succeeded > usb_open_port: SetConfiguration failed with 0xe0004051 > usb_open_port: SetConfiguration failed with 0xe0004051 > dtp92_init_coms: set_usb_port failed ICOM err 0x20000 > Any ideas? No, no ideas. Unlike the situation with Scott, I am not able to reproduce this problem. Did ArgyllCMS V1.4 work ? The above error hints that the DTP94 is simply not responding to USB transactions and timing out. Does any USB peripheral work on that port ? Graeme Gill.