Pin forced low - error codes?

Hi! Cool, Gordon, thanks for the comment. In my case the selftest is run when I set watch with reset() to BTN:

setWatch(function() {
  LED1.write(1); reset();
}, BTN, {edge:"rising", debounce:50, repeat:true}); 

When I press BTN for the first time after powering Puck on, the selftest is run (I see all leds lit up and then this message from the topic, then red led blinking). If I further upload and press without powering off, the selftest is not run.