Traceback (most recent call last):
    score = pt.load_musicxml(score)
  File "/partitura/partitura/utils/misc.py", line 49, in wrapper
    return f(*args, **kwargs)
  File "partitura/partitura/utils/misc.py", line 71, in wrapper
    return f(*args, **kwargs)
  File "partitura/partitura/io/importmusicxml.py", line 231, in load_musicxml
    _parse_parts(document, part_dict)
  File "partitura/partitura/io/importmusicxml.py", line 362, in _parse_parts
    start_times = [0] + [r.end.t for r in part.iter_all(score.Repeat)]
  File "partitura/partitura/io/importmusicxml.py", line 362, in <listcomp>
    start_times = [0] + [r.end.t for r in part.iter_all(score.Repeat)]
AttributeError: 'NoneType' object has no attribute 't'