Hi all. It is the very first time I see this error. I'm using a fresh Ubuntu 20.04. Any clue? $ simtrace2-sniff simtrace2-sniff: symbol lookup error: simtrace2-sniff: undefined symbol: usb_open_claim_interface $ lsusb | grep Osmo Bus 002 Device 002: ID 1d50:60e3 OpenMoko, Inc. Osmocom SIMtrace 2 Find attached a $ strace simtrace2-sniff output in case it helps. Also attached the list of osmocom and simtrace libraries installed. -- *J. Félix Ontañón* Director of Research and Innovation Pod Group A Giesecke+Devrient Company felix.ontanon@podgroup.com UK: +44 (0)1223 850 900 <+44%201223%20850900> USA: +1 415 707 0500 <+1+415+707+0500> ES: +34 954 050 200 <++34+954+050+200> www.podgroup.com <https://podgroup.com/> [image: Facebook] <https://www.facebook.com/podgroupIoT> [image: Twitter] <https://twitter.com/PodGroup_IoT> [image: LinkedIn] <https://www.linkedin.com/company/podgroup> [image: Instagram] <https://www.instagram.com/podgroup_iot>