After running an AZW3 to ePub conversion, it says it went fine, but when I try to open the resulting ePub using Calibre's internal viewer, I get:
Code:
calibre, version 0.9.33
ERROR: Could not open ebook: No valid entries in the spine of this EPUB
Traceback (most recent call last):
File "site-packages/calibre/gui2/viewer/main.py", line 40, in run
File "lib/python2.7/threading.py", line 763, in run
File "site-packages/calibre/ebooks/oeb/iterator/book.py", line 99, in __enter__
File "site-packages/calibre/customize/conversion.py", line 239, in __call__
File "site-packages/calibre/ebooks/conversion/plugins/epub_input.py", line 224, in convert
ValueError: No valid entries in the spine of this EPUB