Description of problem:
Converting DRM protected AZW file to PDF.

Version-Release number of selected component:
calibre-1.21.0-1.fc19

Additional info:
reporter:       libreport-2.2.2
cmdline:        python2 /usr/bin/calibre-parallel
executable:     /usr/bin/calibre-parallel
kernel:         3.11.3-201.lgffedit.fc19.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
mobi6.py:147:check_for_drm:DRMError: el Diccionario de la lengua española (Spanish Edition)

Traceback (most recent call last):
  File "/usr/bin/calibre-parallel", line 20, in <module>
    sys.exit(main())
  File "/usr/lib64/calibre/calibre/utils/ipc/worker.py", line 191, in main
    result = func(*args, **kwargs)
  File "/usr/lib64/calibre/calibre/gui2/convert/gui_conversion.py", line 31, in gui_convert_override
    override_input_metadata=True)
  File "/usr/lib64/calibre/calibre/gui2/convert/gui_conversion.py", line 25, in gui_convert
    plumber.run()
  File "/usr/lib64/calibre/calibre/ebooks/conversion/plumber.py", line 1035, in run
    accelerators, tdir)
  File "/usr/lib64/calibre/calibre/customize/conversion.py", line 241, in __call__
    log, accelerators)
  File "/usr/lib64/calibre/calibre/ebooks/conversion/plugins/mobi_input.py", line 35, in convert
    mr.extract_content(u'.', parse_cache)
  File "/usr/lib64/calibre/calibre/ebooks/mobi/reader/mobi6.py", line 151, in extract_content
    self.check_for_drm()
  File "/usr/lib64/calibre/calibre/ebooks/mobi/reader/mobi6.py", line 147, in check_for_drm
    raise DRMError(name)
DRMError: el Diccionario de la lengua española (Spanish Edition)

Local variables in innermost frame:
self: <calibre.ebooks.mobi.reader.mobi6.MobiReader object at 0x3dd8a90>
name: u'el Diccionario de la lengua espa\xf1ola (Spanish Edition)'