Hello list, recently I moved from Mac/PC on Ubuntu. Currently trying to calibrate my display using Argyll 1.6.3 and dispcalGUI (latest version available). Since a Spectrolino should be used, traying to connect via a Keyspan USA-28Xb PDA. The device is recognized automatically by the system. DispcalGUI detects a device at dev/ttyUSB0. After triggering my measurement I get the following message: Setting up the instrument dispcal: Error - new_disprd() failed with 'Instrument Access Failed' Here is also the complete command line: Command line: dispcal -v2 -d1 -c1 -yc "-P0.5,0.5,1.49868073879" -qm -t5000 -b130.0 -gl -f1.0 -k1.0 "SyncMaster 2014-02-16 130cdm² D5000 neutral L M-S LabLUT" Setting up the instrument dispcal: Error - new_disprd() failed with 'Instrument Access Failed' Any hints? Thanks' in advance Vladimir