Traceback (most recent call last):


 "c:\users\junrong yao\appdata\local\programs\python\python36\lib\runpy.py", line 193, in _run_module_as_main

"__main__", mod_spec)


 "c:\users\junrong yao\appdata\local\programs\python\python36\lib\runpy.py", line 85, in _run_code

exec(code, run_globals)


 "C:\Users\Junrong Yao\AppData\Local\Programs\Python\Python36\Scripts\bert-serving-start.exe\__main__.py", line 7, in <module>


 "c:\users\junrong yao\appdata\local\programs\python\python36\lib\site-packages\bert_serving\server\cli\__init__.py", line 4, in main

with BertServer(get_run_args()) as server:


 "c:\users\junrong yao\appdata\local\programs\python\python36\lib\site-packages\bert_serving\server\__init__.py", line 71, in __init__

self.graph_path, self.bert_config = pool.apply(optimize_graph, (self.args,))
TypeError: 'NoneType' object is not iterable
Traceback (most recent call last):


 "tutorials/plot_sleep.py", line 90, in <module>

raw_train.plot(duration=60, scalings='auto')


 "/home/sik/code/mne-python/mne/io/base.py", line 1873, in plot

event_id=event_id)


 "/home/sik/code/mne-python/mne/viz/raw.py", line 265, in plot_raw

scalings = _compute_scalings(scalings, raw)


 "/home/sik/code/mne-python/mne/viz/utils.py", line 1634, in _compute_scalings

data = inst._read_segment(tmin, tmax)


 "/home/sik/code/mne-python/mne/io/base.py", line 561, in _read_segment

cals, mult)


 "<string>", line 2, in _read_segment_file


 "/home/sik/code/mne-python/mne/utils.py", line 953, in verbose

return function(*args, **kwargs)


 "/home/sik/code/mne-python/mne/io/edf/edf.py", line 284, in _read_segment_file

if ci in stim_channel:
TypeError: argument of type 'NoneType' is not iterable
