Runalyze is saying:
"There are no current activities with an estimatedVO2max value.
VO2max can only be estimated for runs with heart rate data. "
I have a run about 10 days ago that I did with an HRM:
Runalyze correctly shows the HR data and estimates VO2max for each lap and for the workout in a whole in the activity view, but not in the overall view.