Stranded! Spyder loses power, stops, & won't start. Any ideas?

[oldguyinTX]

Out running errands today, beautiful day, Spyder purring right along. After my third stop, I was pulling out of the parking lot and the engine started to stumble and lose power. Then it seemed to catch so I went on my merry way to Costco for gas. Turned into the parking lot and the bike died. I was able to coast downhill to a safe spot and park. I then tried to start it. Cranked just fine, but the engine would not catch. So, I pulled the key, and walked away for ten minutes. Tried again with the same result. It never went into limp mode. Had it towed to the dealer (glad it was today when they were open and not tomorrow). I was able to pull up a code U1055. Anyone know what this is? Thanks in advance.

EDIT: It almost seemed to me like it was starved for fuel, as it would try to fire up, but just couldn't quite get there. I still had about 3/8 of a tank. And the battery is less than a year old and the voltmeter showed 14 volts.