where `TARGET_GNB_IP_ADDRESS` can be 127.0.0.1 if both UE and gNB run on the same machine.
If necessary the user can provide a custom UICC configuration file to the UE with command line option `-O ue.conf`. In case of a multi-UE scenario, the user shall provide a different IMSI to each UE with the command line option `--uicc0.imsi` followed by the IMSI, e.g. `--uicc0.imsi 001010000000001`.