Hi Callum, Yes that path is hardcoded in the code, and you need to have that path manually created and properly chown'ed before using it with osmo-gsm-tester. See https://gitea.osmocom.org/osmocom/docker-playground/src/branch/master/osmo-g... on the steps required to set it up. You can also have a look a osmo-gsm-tester User Manual for info in general too: https://ftp.osmocom.org/docs/latest/osmo-gsm-tester-manual.pdf Regards, Pau -- - Pau Espin Pedrol <pespin@sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte