correct typo
add error handling for launch
it looks like Google is adding some code to the error message?
<img src="https://lh5.googleusercontent.com/-L5rRLeQSKCM/U_S6hXVJtZI/AAAAAAAAFV8/zGcZTsRKgcI/w398-h243-no/Screen%2BShot%2B2014-08-20%2Bat%2B11.07.57%2BAM.png">