Having just discovered it, I am new to urjtag. I see that it is compatible with my Olimex ARM-USB-OCD-H so thought it worth giving a try. I initially installed via apt, connected the Olimex to USB and ran jtag. I then typed: cable ARM-USB-OCD-H but got a message telling me that the interface was not found. I then tried: cable ARM-USB-OCD-H vid=0x15ba pid=0x002b driver=ftdi-mpsse0 but got the same message. I then removed the version from the repository with apt remove and then apt purge and proceeded...