1. Disconnect the Sun SPOT from the USB cable
2. Kill all the ant and java processes listening on the port
3. Hold the control button in for a few seconds until a double red flash indicates that the Sun SPOT has powered down (NB doing this *after* disconnecting).
4. Type this command at a command prompt:
ant -Dport=xxx upgrade
where xxx is the port name
5. Plug it in as soon as the ant script starts to complain that the port isn't available. *Don't* push the reset button: this isn't necessary and may confuse.
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