Erro ao executar now run

[anaeletrica]

Ao executar o script https://github.com/gems-uff/pypofacets/blob/master/modular_pypofacets.py) pela linha de comando:

now run modular_pypofacets.py BOX input_data_file_002.dat

Retorna o seguinte erro:
[now] TypeError("unsupported operand type(s) for +=: 'int' and 'NoneType'")
the execution finished with an uncaught exception. Traceback (most recent call last):
File "C:\Users\rita\Documents\bla\myenv\lib\site-packages\noworkflow-2.0.0-py3.7.egg\noworkflow\now\collection\prov_execution\execution.py", line 64, in collect_provenance
exec(compiled, metascript.namespace) # pylint: disable=exec-used
File "C:\Users\rita\Documents\bla\PyPOFacets\modular_pypofacets.py", line 212, in
calculate_spherical_coordinate_system_radial_unit_vector(i2s, D0, output_dir)
File "C:\Users\rita\Documents\bla\myenv\lib\site-packages\noworkflow-2.0.0-py3.7.egg\noworkflow\now\collection\prov_execution\collector.py", line 1207, in _call
result = future.func(*args, **kwargs)
File "C:\Users\rita\Documents\bla\myenv\lib\site-packages\noworkflow-2.0.0-py3.7.egg\noworkflow\now\collection\prov_execution\collector.py", line 1371, in new_function_def
activation, function_def, args, kwargs, default_values, defaults, *args, **kwargs
File "C:\Users\rita\Documents\bla\PyPOFacets\modular_pypofacets.py", line 165, in calculate_spherical_coordinate_system_radial_unit_vector
File "C:\Users\rita\Documents\bla\myenv\lib\site-packages\noworkflow-2.0.0-py3.7.egg\noworkflow\now\collection\prov_execution\collector.py", line 1122, in assign
return self.assign_multiple(activation, assign, target_info, depa, ldepa, back + 1)
File "C:\Users\rita\Documents\bla\myenv\lib\site-packages\noworkflow-2.0.0-py3.7.egg\noworkflow\now\collection\prov_execution\collector.py", line 1066, in assign_multiple
activation, assign, target_info, custom_dependency, back + 1
File "C:\Users\rita\Documents\bla\myenv\lib\site-packages\noworkflow-2.0.0-py3.7.egg\noworkflow\now\collection\prov_execution\collector.py", line 1083, in assign_multiple_apply
delta += self.assign(activation, assign.sub(val, adepa), subcomp, back + 1)
TypeError: unsupported operand type(s) for +=: 'int' and 'NoneType'