void tree4w()
{
…
// Create two branches, split one.
[color=red] t4.Branch(“event_branch”, &event,16000,2);[/color]
t4.Branch(“event_not_split”, &event,16000,0);
…
}
// the line in red should be
[color=red] t4.Branch(“event_split”, &event,16000,99);[/color]