Unicode error when loading workbook

Created originally on Bitbucket by thedauntless (Jeroen Beckers)

Openpyxl version: openpyxl-2.4.0b1-py2.7 on Windows 10.

When I use load_workbook on a specific xlsx file, it gives the following error output:

#!code

Traceback (most recent call last):
  File ".\generate.py", line 758, in <module>
    wb = openpyxl.reader.excel.load_workbook(sheetFileName, data_only="True")
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\reader\excel.py", line 152, in load_workbook
    parser.parse()
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\packaging\workbook.py", line 54, in parse
    rel.Target))
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\workbook\external_link\external.py", line 186, in read_external_link
    book = ExternalLink.from_tree(node)
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\descriptors\serialisable.py", line 76, in from_tree
    obj = desc.expected_type.from_tree(el)
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\descriptors\serialisable.py", line 76, in from_tree
    obj = desc.expected_type.from_tree(el)
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\descriptors\serialisable.py", line 76, in from_tree
    obj = desc.expected_type.from_tree(el)
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\descriptors\serialisable.py", line 76, in from_tree
    obj = desc.expected_type.from_tree(el)
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\descriptors\serialisable.py", line 76, in from_tree
    obj = desc.expected_type.from_tree(el)
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\descriptors\serialisable.py", line 89, in from_tree
    return cls(**attrib)
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\workbook\external_link\external.py", line 47, in __init__
    self.v = v
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\descriptors\nested.py", line 36, in __set__
    super(Nested, self).__set__(instance, value)
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\descriptors\base.py", line 69, in __set__
    value = _convert(self.expected_type, value)
  File "C:\Python27\lib\site-packages\openpyxl-2.4.0b1-py2.7.egg\openpyxl\descriptors\base.py", line 59, in _convert
    raise TypeError('expected ' + str(expected_type) + ' -- ' + str(value.encode("utf-8")))
TypeError: expected <type 'str'> -- C├®dric

As you can see, I have already modified the base.py file so that I have some feedback over what goes wrong.

The first thing I tried was a "replace all" on Cédric -> Cedric, but unfortunately, the same error is given (even though Cédric shouldn't be present in the xlsx anymore).

Unfortunately, I can't share the xlsx file, and I also haven't been able to reduce the problem to a presentable file.

This works fine on my OS X computer, but fails on Windows.

Are there any other places I should be looking for "Cédric" ? Places that excel won't find itself? And shouldn't everything be loaded in unicode anyway?

Attachments: TEST1.xlsx