[BlueBream] error at Getting Started!

[mese79]

Hi
I just started to learn bluebream. i use BlueBream v1.0b4 documentation
Getting Started, 
but i'v got this error when i run buildout command in my project folder:
Develop: '/home/mehdi/Programing/Python/Bluebream/testproject/.'
install_dir
/home/mehdi/Programing/Python/Bluebream/testproject/develop-eggs/tmpoySCRbbuild
Installing app.
Getting distribution for 'mechanize==0.1.11'.
While:
  Installing app.
  Getting distribution for 'mechanize==0.1.11'.

An internal error occured due to a bug in either zc.buildout or in a
recipe being used:
Traceback (most recent call last):
  File
"/home/mehdi/Programing/Python/Bluebream/testproject/eggs/zc.buildout-1.4.4-py2.7.egg/zc/buildout/buildout.py",
line 1683, in main
    getattr(buildout, command)(args)
  File
"/home/mehdi/Programing/Python/Bluebream/testproject/eggs/zc.buildout-1.4.4-py2.7.egg/zc/buildout/buildout.py",
line 555, in install
    installed_files = self[part]._call(recipe.install)
  File
"/home/mehdi/Programing/Python/Bluebream/testproject/eggs/zc.buildout-1.4.4-py2.7.egg/zc/buildout/buildout.py",
line 1227, in _call
    return f()
  File
"/home/mehdi/Programing/Python/Bluebream/testproject/eggs/zc.recipe.egg-1.2.2-py2.7.egg/zc/recipe/egg/egg.py",
line 132, in install
    reqs, ws = self.working_set()
  File
"/home/mehdi/Programing/Python/Bluebream/testproject/eggs/zc.recipe.egg-1.2.2-py2.7.egg/zc/recipe/egg/egg.py",
line 90, in working_set
    **kw)
  File
"/home/mehdi/Programing/Python/Bluebream/testproject/eggs/zc.buildout-1.4.4-py2.7.egg/zc/buildout/easy_install.py",
line 800, in install
    return installer.install(specs, working_set)
  File
"/home/mehdi/Programing/Python/Bluebream/testproject/eggs/zc.buildout-1.4.4-py2.7.egg/zc/buildout/easy_install.py",
line 670, in install
    for dist in self._get_dist(requirement, ws, self._always_unzip
  File
"/home/mehdi/Programing/Python/Bluebream/testproject/eggs/zc.buildout-1.4.4-py2.7.egg/zc/buildout/easy_install.py",
line 494, in _get_dist
    dist = self._fetch(avail, tmp, self._download_cache)
  File
"/home/mehdi/Programing/Python/Bluebream/testproject/eggs/zc.buildout-1.4.4-py2.7.egg/zc/buildout/easy_install.py",
line 457, in _fetch
    new_location = self._index.download(dist.location, tmp)
  File "/usr/lib/python2.7/site-packages/setuptools/package_index.py", line
401, in download
    found = self._download_url(scheme.group(1), spec, tmpdir)
  File "/usr/lib/python2.7/site-packages/setuptools/package_index.py", line
648, in _download_url
    return self._attempt_download(url, filename)
  File "/usr/lib/python2.7/site-packages/setuptools/package_index.py", line
657, in _attempt_download
    headers = self._download_to(url, filename)
  File "/usr/lib/python2.7/site-packages/setuptools/package_index.py", line
569, in _download_to
    size = int(headers["Content-Length"])
ValueError: invalid literal for int() with base 10: '241357, 241357'


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