ebook-viewer cannot open htmlz-files

[Rolf Haertl]

The Calibre ebook-viewer cannot open htmlz-files generated by the ebook-convert module.

The following error code is returned:

"calibre, version 2.85.1
FEHLER: eBook konnte nicht geöffnet werden: 'NoneType' object is not iterable

Traceback (most recent call last):
  File "site-packages/calibre/gui2/viewer/main.py", line 86, in run
  File "threading.py", line 763, in run
  File "site-packages/calibre/ebooks/oeb/iterator/book.py", line 150, in __enter__
TypeError: 'NoneType' object is not iterable"

Calibre was extracted and installed from calibre-2.85.1-x86_64.txz under Ubuntu 16.04 LTS (64-bit).

[Kovid Goyal (kovid)]

I cannot replicate, steps I tried:

1) ebook-convert file.epub .htmlz
2) ebook-viewer file.htmlz

File is successfully opened.

[Er Ts (ebookhoarder)]

Calibre on arch linux 64bit cannot open htmlz converted by calibre:

calibre, version 3.34.0
ERROR: Could not open e-book: 'NoneType' object is not iterable

Traceback (most recent call last):
  File "/usr/lib/calibre/calibre/gui2/viewer/main.py", line 87, in run
    Thread.run(self)
  File "/usr/lib/python2.7/threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/calibre/calibre/ebooks/oeb/iterator/book.py", line 155, in __enter__
    ordered = [i for i in self.opf.spine if i.is_linear] + \
TypeError: 'NoneType' object is not iterable

[Er Ts (ebookhoarder)]

Please check attached file which was converted in calibre from epub to htmlz

[Kovid Goyal (kovid)]

Fixed in branch master. The fix will be in the next release. calibre is usually released every alternate Friday.

 status fixreleased