Traceback (most recent call last):
  File "/eos/home-i00/t/tmiralle/SWAN_projects/l0caloscripts/for_Run1/MakeNPZFiles_PIDCALIB_run1-11_0.py", line 55, in <module>
    tree = f[f'DSt_{part}Tuple/DecayTree']
  File "/cvmfs/sft.cern.ch/lcg/views/LCG_102b_swan/x86_64-centos7-gcc11-opt/lib/python3.9/site-packages/uproot3/rootio.py", line 226, in __getitem__
    return self.get(name)
  File "/cvmfs/sft.cern.ch/lcg/views/LCG_102b_swan/x86_64-centos7-gcc11-opt/lib/python3.9/site-packages/uproot3/rootio.py", line 341, in get
    out = out.get(name=n, cycle=cycle)
  File "/cvmfs/sft.cern.ch/lcg/views/LCG_102b_swan/x86_64-centos7-gcc11-opt/lib/python3.9/site-packages/uproot3/rootio.py", line 371, in get
    return last.get()
  File "/cvmfs/sft.cern.ch/lcg/views/LCG_102b_swan/x86_64-centos7-gcc11-opt/lib/python3.9/site-packages/uproot3/rootio.py", line 1050, in get
    return _classof(self._context, self._fClassName).read(self._source, self._cursor.copied(), self._context, self)
  File "/cvmfs/sft.cern.ch/lcg/views/LCG_102b_swan/x86_64-centos7-gcc11-opt/lib/python3.9/site-packages/uproot3/rootio.py", line 990, in read
    out._postprocess(source, cursor, context, parent)
  File "/cvmfs/sft.cern.ch/lcg/views/LCG_102b_swan/x86_64-centos7-gcc11-opt/lib/python3.9/site-packages/uproot3/tree.py", line 319, in _postprocess
    branch._countleaf = branch._fLeaves[0]._fLeafCount
AttributeError: 'Undefined' object has no attribute '_fLeafCount'