When jetson-io.py encounters an error it displays the message on the curses screen which is immediately destroyed. This causes the tool to seem like it isn’t actually doing anything. In the event of an error the tool should either wait for user input before closing the curses window or write the errors to the console.
As a workaround you can run the tool through the debug serial console. The curses window will then be written to the screen and the error can still be read after the tool exits.