In one of the college games yesterday (forget which one, maybe OU / Arkansas), there was a pop up in foul territory, 3rd base side. C and 3B converge in plenty of time; C yields, but at the last moment 3B backs away (she seemed afraid of a collision). Ball falls to ground between them untouched. Ruling on the play is given as an error. I am sympathetic, as ball should have been easily caught (both my DD are pitchers.....), but is this correct?