Had to reload the tagtool code into the Arduino today as the Tagtool stopped responding. Tried rebooting the machine, tried another machine, checked USB connections, checked tagtool connections. Reloaded the Tagtool software into the Arduion, it worked again. So when we use the Tagtool in the field, we need to have the code and the Arduino IDE ready for reloading software if need be. Better to have a standby Tagtool unit too.