[vakya]

Merging user specified metadata...
Detecting structure...
Auto generated TOC with 13 entries.
Flattening CSS and remapping font sizes...
Traceback (most recent call last):
File "/usr/bin/ebook-convert", line 16, in <module>
sys.exit(main())
File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 249, in main
plumber.run()
File "/usr/lib/calibre/calibre/ebooks/conversion/plumber.py", line 792, in run
flattener(self.oeb, self.opts)
File "/usr/lib/calibre/calibre/ebooks/oeb/transforms/flatcss.py", line 123, in __call__
self.sbase = self.baseline_spine() if self.fbase else None
File "/usr/lib/calibre/calibre/ebooks/oeb/transforms/flatcss.py", line 167, in baseline_spine
sbase = max(sizes.items(), key=operator.itemgetter(1))[0]
ValueError: max() arg is an empty sequence
Error in sys.excepthook:
Traceback (most recent call last):
File "/usr/lib/python2.6/dist-packages/apport_python_hook.py", line 85, in apport_excepthook
if pr.check_ignored():
File "/usr/lib/python2.6/dist-packages/apport/report.py", line 753, in check_ignored
dom = self._get_ignore_dom()
File "/usr/lib/python2.6/dist-packages/apport/report.py", line 714, in _get_ignore_dom
dom = xml.dom.getDOMImplementation().createDocument(None , 'apport', None)
File "/usr/lib/python2.6/dist-packages/cssutils/__init__.py", line 137, in createDocument
raise NotImplementedError
NotImplementedError

Original exception was:
Traceback (most recent call last):
File "/usr/bin/ebook-convert", line 16, in <module>
sys.exit(main())
File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 249, in main
plumber.run()
File "/usr/lib/calibre/calibre/ebooks/conversion/plumber.py", line 792, in run
flattener(self.oeb, self.opts)
File "/usr/lib/calibre/calibre/ebooks/oeb/transforms/flatcss.py", line 123, in __call__
self.sbase = self.baseline_spine() if self.fbase else None
File "/usr/lib/calibre/calibre/ebooks/oeb/transforms/flatcss.py", line 167, in baseline_spine
sbase = max(sizes.items(), key=operator.itemgetter(1))[0]
ValueError: max() arg is an empty sequence