Python error using ebook-convert (Linux)

[p014k]

Hello.

I'm trying to convert an .epub to a .mobi using the ebook-convert command line included with Calibre (version 0.7.44) on Linux. I've used it before with several successful conversions, but for this particular .epub, I'm getting this error;

Traceback (most recent call last):
  File "/usr/bin/ebook-convert", line 19, in <module>
    sys.exit(main())
  File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 279, in main
    plumber.run()
  File "/usr/lib/calibre/calibre/ebooks/conversion/plumber.py", line 904, in run
    accelerators, tdir)
  File "/usr/lib/calibre/calibre/customize/conversion.py", line 204, in __call__
    log, accelerators)
  File "/usr/lib/calibre/calibre/ebooks/epub/input.py", line 138, in convert
    zf.extractall(os.getcwd())
  File "/usr/lib/calibre/calibre/utils/zipfile.py", line 1054, in extractall
    self.extract(zipinfo, path, pwd)
  File "/usr/lib/calibre/calibre/utils/zipfile.py", line 1042, in extract
    return self._extract_member(member, path, pwd)
  File "/usr/lib/calibre/calibre/utils/zipfile.py", line 1097, in _extract_member
    shutil.copyfileobj(source, target)
  File "/usr/lib/python2.7/shutil.py", line 48, in copyfileobj
    buf = fsrc.read(length)
  File "/usr/lib/calibre/calibre/utils/zipfile.py", line 649, in read
    newdata = self.dc.decompress(newdata)
zlib.error: Error -3 while decompressing: invalid stored block lengths

Does anyone have a solution to this problem?

[DoctorOhh]

Originally Posted by p014k

I'm trying to convert an .epub to a .mobi using the ebook-convert command line included with Calibre (version 0.7.44) on Linux. I've used it before with several successful conversions, but for this particular .epub, I'm getting this error;
...~~~...
Does anyone have a solution to this problem?

I'm afraid I have no solution for you. Why are you using a version of calibre over a year and a half old?

[theducks]

Originally Posted by dwanthny

I'm afraid I have no solution for you. Why are you using a version of calibre over a year and a half old?

I suspect that is the version in the Repository for that Distro's release version which never gets an update once the 'version release' is done (Ubuntu). To get the next (already out of date) Calibre, you have to uggrade your Distro version.

OP
Uninstall that version and paste the command line on the Calibre Linux download page (repeat for every Calibre update you want)

[p014k]

Indeed, I was running an old version. I upgraded to 0.8.68 and now this is the error I get;

Traceback (most recent call last):
  File "site.py", line 58, in main
  File "site-packages/calibre/ebooks/conversion/cli.py", line 325, in main
  File "site-packages/calibre/ebooks/conversion/plumber.py", line 989, in run
  File "site-packages/calibre/customize/conversion.py", line 239, in __call__
  File "site-packages/calibre/ebooks/conversion/plugins/epub_input.py", line 154, in convert
  File "site-packages/calibre/utils/zipfile.py", line 1087, in extractall
  File "site-packages/calibre/utils/zipfile.py", line 1071, in extract
  File "site-packages/calibre/utils/zipfile.py", line 1140, in _extract_member
  File "shutil.py", line 49, in copyfileobj
  File "site-packages/calibre/utils/zipfile.py", line 607, in read
  File "site-packages/calibre/utils/zipfile.py", line 659, in read1
error: Error -3 while decompressing: invalid stored block lengths

[kovidgoyal]

THat error indicates the epub file you are trying to convert is not a valid zip file.