Thank you for your help! I am using a Macbook Air. Our current prototype is based off of a breadboard and we have checked that all connections are correct. The other day I was able to run the sketch with a high sensitivity value and as soon as I switched it to a low sensitivity value and uploaded the code I received the Exit status 1 error message. I have tried using a different USB cord but that didn't make a difference. Do you think its a hardware issue as opposed to the software? In other words, does my code look flaw-free?