[hf11]

I had trouble opening an ebook which I downloaded but fixed the problem by copying it to another location, extracting the file, re-zipping it and extracting it again.

Now I can open the ebook in it's new location, but if I try and copy it anywhere else it won't open. The message I get is - "Failed to read book". Click "Show Details" for more information.


Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\simple_worker.py", line 284, in main
File "site-packages\calibre\ebooks\oeb\iterator\book.py", line 65, in extract_book
File "site-packages\calibre\customize\conversion.py", line 245, in __call__
File "site-packages\calibre\ebooks\conversion\plugins\html_in put.py", line 87, in convert
File "site-packages\calibre\ebooks\conversion\plumber.py", line 1292, in create_oebbook
File "site-packages\calibre\ebooks\oeb\reader.py", line 72, in __call__
File "site-packages\calibre\ebooks\oeb\reader.py", line 703, in _all_from_opf
File "site-packages\calibre\ebooks\oeb\reader.py", line 348, in _spine_from_opf
OEBError: Spine is empty


Any ideas on how to fix this problem?