}
public void test040_create_series_and_delete_value() {
try {
UpdatableChronicle ent = db.getChronicle("bt.fooent", true).edit();
UpdatableSeries<Double> s = ent.updateSeries("fooser");
assertNotNull(s);
s.setValue(Day.DOMAIN.time("2011-06-30"), Double.NaN);
s.applyUpdates();
// next should not throw an exception
s.setValue(Day.DOMAIN.time("2011-06-30"), Double.NaN);