Traceback (most recent call last):


 "synthDriverHandler.pyo", line 88, in setSynth


 "synthDriverHandler.pyo", line 497, in loadSettings


 "synthDriverHandler.pyo", line 33, in changeVoice


 "synthSettingsRing.pyo", line 143, in updateSupportedSettings


 "synthSettingsRing.pyo", line 40, in __init__


 "baseObject.pyo", line 21, in __get__


 "synthDriverHandler.pyo", line 387, in _get_availableVoices


 "synthDrivers\oneCore.pyo", line 229, in _getAvailableVoices


 "synthDrivers\oneCore.pyo", line 241, in _isVoiceValid
UnicodeDecodeError: 'ascii' codec can't decode byte 0xbf in position 16: ordinal not in range(128)

[ERROR] Traceback (most recent call last):


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbgrader/converters/base.py", line 293, in convert_notebooks

self.convert_single_notebook(notebook_filename)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbgrader/converters/base.py", line 249, in convert_single_notebook

output, resources = self.exporter.from_filename(notebook_filename, resources=resources)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbconvert/exporters/exporter.py", line 174, in from_filename

return self.from_file(f, resources=resources, **kw)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbconvert/exporters/exporter.py", line 192, in from_file

return self.from_notebook_node(nbformat.read(file_stream, as_version=4), resources=resources, **kw)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbconvert/exporters/notebook.py", line 31, in from_notebook_node

nb_copy, resources = super(NotebookExporter, self).from_notebook_node(nb, resources, **kw)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbconvert/exporters/exporter.py", line 134, in from_notebook_node

nb_copy, resources = self._preprocess(nb_copy, resources)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbconvert/exporters/exporter.py", line 311, in _preprocess

nbc, resc = preprocessor(nbc, resc)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbconvert/preprocessors/base.py", line 47, in __call__

return self.preprocess(nb, resources)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbgrader/preprocessors/headerfooter.py", line 24, in preprocess

header_nb = read_nb(fh, as_version=current_nbformat)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbgrader/nbgraderformat/v1.py", line 124, in read_v1

nb = _read(source, as_version, **kwargs)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/site-packages/nbformat/__init__.py", line 141, in read

return reads(fp.read(), as_version, **kwargs)


 "/home/itutor/anaconda3/envs/test-nbgrader/lib/python3.6/encodings/ascii.py", line 26, in decode

return codecs.ascii_decode(input, self.errors)[0]

UnicodeDecodeError: 'ascii' codec can't decode byte 0xe4 in position 90: ordinal not in range(128)


