ABS light (and only ABS light) is on... ??

So I finally go around to installing my extended brake lines (front and back). I followed the WAL brake line install and bleeding write-ups. Unfortunately I had to leave the house (my son's truck broke down and I had to go recover it) for about 4 hours after replacing the lines but before bleeding the lines. I did bleed them upon return and and when finished I didn't have any bubbles coming out the bleeder valves. After this, my ABS light is on and stays on. The brakes feel a bit soft. Would this be a symptom that I've got air in the ABS units? From what I can find, I'm thinking this means a trip to the dealership for them to run the ABS bleeding sequence?

Anyone have a similar experience? Thanks in advance.