# ./p84.py
Traceback (most recent call last):
  File "./p84.py", line 17, in <module>
    with open(fname_counter_tc, 'rb') as data_file:
FileNotFoundError: [Errno 2] No such file or directory: 'counter_tc'

# ./p85.py
Traceback (most recent call last):
  File "/opt/conda/lib/python3.7/site-packages/scipy/io/matlab/mio.py", line 33, in _open_file
    return open(file_like, 'rb'), True
FileNotFoundError: [Errno 2] No such file or directory: 'matrix_x'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./p85.py", line 10, in <module>
    matrix_x = io.loadmat(fname_matrix_x)['matrix_x']
  File "/opt/conda/lib/python3.7/site-packages/scipy/io/matlab/mio.py", line 141, in loadmat
    MR, file_opened = mat_reader_factory(file_name, appendmat, **kwargs)
  File "/opt/conda/lib/python3.7/site-packages/scipy/io/matlab/mio.py", line 64, in mat_reader_factory
    byte_stream, file_opened = _open_file(file_name, appendmat)
  File "/opt/conda/lib/python3.7/site-packages/scipy/io/matlab/mio.py", line 39, in _open_file
    return open(file_like, 'rb'), True
FileNotFoundError: [Errno 2] No such file or directory: 'matrix_x.mat'

# ./p86.py
Traceback (most recent call last):
  File "./p86.py", line 12, in <module>
    with open(fname_dict_index_t, 'rb') as data_file:
FileNotFoundError: [Errno 2] No such file or directory: 'dict_index_t'

# ./p87.py
Traceback (most recent call last):
  File "./p87.py", line 19, in <module>
    with open(fname_dict_index_t, 'rb') as data_file:
FileNotFoundError: [Errno 2] No such file or directory: 'dict_index_t'

# ./p88.py
Traceback (most recent call last):
  File "./p88.py", line 19, in <module>
    with open(fname_dict_index_t, 'rb') as data_file:
FileNotFoundError: [Errno 2] No such file or directory: 'dict_index_t'

# ./p89.py
Traceback (most recent call last):
  File "./p89.py", line 19, in <module>
    with open(fname_dict_index_t, 'rb') as data_file:
FileNotFoundError: [Errno 2] No such file or directory: 'dict_index_t'