Calibre fighting with Ubuntu Maverick

[goetzlisa]

I'm an Linux user, currently running Unbuntu Maverick. Just updated from 7.18 to 7.36, but when I run the wizard I getting the following error:


ERROR: ERROR: Unhandled exception: <b>TypeError</b>:expected string without null bytes

Traceback (most recent call last):
File "/usr/lib/calibre/calibre/gui2/wizard/__init__.py", line 773, in accept
page.commit()
File "/usr/lib/calibre/calibre/gui2/wizard/__init__.py", line 459, in commit
dev.commit()
File "/usr/lib/calibre/calibre/gui2/wizard/__init__.py", line 58, in commit
cls.set_output_profile()
File "/usr/lib/calibre/calibre/gui2/wizard/__init__.py", line 47, in set_output_profile
recs = load_defaults('page_setup')
File "/usr/lib/calibre/calibre/ebooks/conversion/config.py", line 40, in load_defaults
r.from_string(raw)
File "/usr/lib/calibre/calibre/ebooks/conversion/config.py", line 80, in from_string
d = eval(raw)
TypeError: expected string without null bytes


also, got this when trying to convert to another format:

ERROR: ERROR: Unhandled exception: <b>TypeError</b>:expected string without null bytes

Traceback (most recent call last):
File "/usr/lib/calibre/calibre/gui2/actions/convert.py", line 109, in convert_ebook
self.gui.library_view.model().db, book_ids, out_format=prefs['output_format'])
File "/usr/lib/calibre/calibre/gui2/tools.py", line 40, in convert_single_ebook
d = SingleConfig(parent, db, book_id, None, out_format)
File "/usr/lib/calibre/calibre/gui2/convert/single.py", line 124, in __init__
self.setup_pipeline()
File "/usr/lib/calibre/calibre/gui2/convert/single.py", line 173, in setup_pipeline
ps = widget_factory(PageSetupWidget)
File "/usr/lib/calibre/calibre/gui2/convert/single.py", line 167, in widget_factory
self.plumber.get_option_help, self.db, self.book_id)
File "/usr/lib/calibre/calibre/gui2/convert/page_setup.py", line 57, in __init__
self.initialize_options(get_option, get_help, db, book_id)
File "/usr/lib/calibre/calibre/gui2/convert/__init__.py", line 70, in initialize_options
defaults = load_defaults(self._name)
File "/usr/lib/calibre/calibre/ebooks/conversion/config.py", line 40, in load_defaults
r.from_string(raw)
File "/usr/lib/calibre/calibre/ebooks/conversion/config.py", line 80, in from_string
d = eval(raw)
TypeError: expected string without null bytes


Tried reverting to 7.18, but the same problem happens. In truth, never really used 7.18 since switching to Maverick, so not sure when the problem began. No improvement after updating python.

[desertgrandma]

Welcome to MobileRead, goetzlisa

Helpful suggestions should arrive soon.

[kovidgoyal]

rm -r .config/calibre/conversion/

[goetzlisa]

Thanks for the welcome, and for the really fast reply.

It worked!

So, all I had to do is remove a hidden configuration file? I wonder how long that would have taken for me to figure that out?

[kovidgoyal]

You're welcome

your config file had gotten corrupted, and it isn't really hidden, you can access all calibre config files from preferences->miscellaneous

Usually when an application fails to start, the first thing I do is try to start with a clean config.