Apps won't run on GAE - 'unable to bind to localhost:0'

Question

I recently upgraded Google App Engine to 1.7.7. and have not been able to run any apps locally since. This includes apps that worked before the update and apps I\'ve created

Answer 1

The last time you ran the app engine command you shut it down with ctrl-z instead (shunt to background) instead of ctrl-c (kill). Restart the terminal and next time you shut down app engine from terminal use ctrl-c and you'll be fine.