[adrian1944]

I have managed to use this very useful function with some books but now have had three in a row failing with the same error



calibre, version 0.9.19 (darwin, isfrozen: True)
Conversion Error: Failed: Polish Black Plumes

Polish Black Plumes
Python function terminated unexpectedly: 'NoneType' object has no attribute 'lower'
Found existing cover page
Existing cover page is a simple wrapper, removing it
Traceback (most recent call last):
File "/Applications/calibre.app/Contents/Resources/Python/lib/python2.7/site.py", line 147, in main
return run_entry_point()
File "/Applications/calibre.app/Contents/Resources/Python/lib/python2.7/site.py", line 116, in run_entry_point
return getattr(pmod, func)()
File "site-packages/calibre/utils/ipc/worker.py", line 189, in main
File "site-packages/calibre/ebooks/oeb/polish/main.py", line 171, in gui_polish
File "site-packages/calibre/ebooks/oeb/polish/main.py", line 131, in polish
File "site-packages/calibre/ebooks/oeb/polish/cover.py", line 39, in set_cover
File "site-packages/calibre/ebooks/oeb/polish/cover.py", line 257, in set_epub_cover
File "site-packages/calibre/ebooks/oeb/polish/replace.py", line 47, in replace_links
AttributeError: 'NoneType' object has no attribute 'lower'


regards




adrian