invalid continuation byte error

[Eithrial]

Ive converted pdf file via sent-to-kindle email and when I want to convert this book to epub I got this error:

calibre, version 0.9.30
ERROR: Could not open ebook: invalid continuation byte

Traceback (most recent call last):
  File "/usr/lib/calibre/calibre/gui2/viewer/main.py", line 40, in run
    Thread.run(self)
  File "/usr/lib/python2.7/threading.py", line 763, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/calibre/calibre/ebooks/oeb/iterator/book.py", line 99, in __enter__
    {}, self.base)
  File "/usr/lib/calibre/calibre/customize/conversion.py", line 239, in __call__
    log, accelerators)
  File "/usr/lib/calibre/calibre/ebooks/conversion/plugins/mobi_input.py", line 40, in convert
    opf = os.path.abspath(mr())
  File "/usr/lib/calibre/calibre/ebooks/mobi/reader/mobi8.py", line 95, in __call__
    spine = self.expand_text(resource_map)
  File "/usr/lib/calibre/calibre/ebooks/mobi/reader/mobi8.py", line 425, in expand_text
    return expand_mobi8_markup(self, resource_map, self.log)
  File "/usr/lib/calibre/calibre/ebooks/mobi/reader/markup.py", line 310, in expand_mobi8_markup
    parts = update_internal_links(mobi8_reader, log)
  File "/usr/lib/calibre/calibre/ebooks/mobi/reader/markup.py", line 51, in update_internal_links
    parts.append(raw.decode(mr.header.codec))
  File "/usr/lib/python2.7/encodings/utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode bytes in position 343331-343332: invalid continuation byte

What to do with that?

[kovidgoyal]

https://launchpad.net/bugs/1179144