locale error running `sudo do-release-upgrade`

error.txt

$ sudo do-release-upgrade # Trying to upgrade from Ubuntu LTS 12.04 to 14.04
Checking for a new Ubuntu release
ERROR:root:gedefaultlocale() failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/utils.py", line 353, in get_lang
    (locale_s, encoding) = locale.getdefaultlocale()
  File "/usr/lib/python2.7/locale.py", line 503, in getdefaultlocale
    return _parse_localename(localename)
  File "/usr/lib/python2.7/locale.py", line 435, in _parse_localename
    raise ValueError, 'unknown locale: %s' % localename
ValueError: unknown locale: en_ZM
ERROR:root:gedefaultlocale() failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/utils.py", line 353, in get_lang
    (locale_s, encoding) = locale.getdefaultlocale()
  File "/usr/lib/python2.7/locale.py", line 503, in getdefaultlocale
    return _parse_localename(localename)
  File "/usr/lib/python2.7/locale.py", line 435, in _parse_localename
    raise ValueError, 'unknown locale: %s' % localename
ValueError: unknown locale: en_ZM
ERROR:root:gedefaultlocale() failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/utils.py", line 353, in get_lang
    (locale_s, encoding) = locale.getdefaultlocale()
  File "/usr/lib/python2.7/locale.py", line 503, in getdefaultlocale
    return _parse_localename(localename)
  File "/usr/lib/python2.7/locale.py", line 435, in _parse_localename
    raise ValueError, 'unknown locale: %s' % localename
ValueError: unknown locale: en_ZM
ERROR:root:gedefaultlocale() failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/utils.py", line 353, in get_lang
    (locale_s, encoding) = locale.getdefaultlocale()
  File "/usr/lib/python2.7/locale.py", line 503, in getdefaultlocale
    return _parse_localename(localename)
  File "/usr/lib/python2.7/locale.py", line 435, in _parse_localename
    raise ValueError, 'unknown locale: %s' % localename
ValueError: unknown locale: en_ZM
ERROR:root:gedefaultlocale() failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/utils.py", line 353, in get_lang
    (locale_s, encoding) = locale.getdefaultlocale()
  File "/usr/lib/python2.7/locale.py", line 503, in getdefaultlocale
    return _parse_localename(localename)
  File "/usr/lib/python2.7/locale.py", line 435, in _parse_localename
    raise ValueError, 'unknown locale: %s' % localename
ValueError: unknown locale: en_ZM
ERROR:root:gedefaultlocale() failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/utils.py", line 353, in get_lang
    (locale_s, encoding) = locale.getdefaultlocale()
  File "/usr/lib/python2.7/locale.py", line 503, in getdefaultlocale
    return _parse_localename(localename)
  File "/usr/lib/python2.7/locale.py", line 435, in _parse_localename
    raise ValueError, 'unknown locale: %s' % localename
ValueError: unknown locale: en_ZM
No new release found
$

Thanks @generaleye!

@generaleye Thanks. Worked for me.

Great quick fix @generaleye
Thanks!

run this command will help to

export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8

and this;
export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8
export LANGUAGE=en_US.UTF-8

Try adding this line to /etc/environment and rebooting.
LC_ALL="en_US.utf8"

thanks!

Thanks @generaleye! Also worked for me :)

thanks @generaleye