I had "EWS" in Utah on my 2007 Adventure in 2008 and it was intermittent. The next day it started and then came back with "EWS" again when I shut off again. I believe I got it started two more times after waiting hours.
SLC BMW robbed the ring off a new bike to get me going and never had a problem after.
PS My avatar is the day after I got it fixed at....... the Bonneville Salt Flats! :-)