Hallo Wim,
I was afraid to hear this, not sure you can repeat it without the complete environment I am working in, which would mean you need access to the experiment afs pages. Anyhow, i copied a file to my public directory on afs: /afs/cern.ch/user/t/truf/public
f = ROOT.TFile(‘ship.MuonBack-TGeant4.root’)
sTree=f.cbmsim
sTree
<ROOT.TTree object (“cbmsim”) at 0x296ef60>
sTree.MCTrack
Traceback (most recent call last):
File “”, line 1, in
TypeError: attempt to bind ROOT object w/o class
cheers Thomas