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Old 06-03-2013, 03:36 PM   #143
JSWolf
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Posts: 52,298
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Join Date: Nov 2006
Location: Roslindale, Massachusetts
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Quote:
Originally Posted by gers1978 View Post
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
Did you validate the ePub? You have to in order to find what needs fixing. Then after it validates with epubcheck 3.0.1, then you can open it in the Calibre Viewer.
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