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    <div class="moz-cite-prefix">Le 04/10/2012 13:56, Daviey Walker a
      écrit :<br>
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    <blockquote
cite="mid:CACyjiAhMzTO7UY-FN5hx0v0W+XiS7jUkng8XYikap3m5+nSM1Q@mail.gmail.com"
      type="cite">
      <pre wrap="">On 4 October 2012 12:51, Bilel Msekni <a class="moz-txt-link-rfc2396E" href="mailto:skible@hotmail.fr"><skible@hotmail.fr></a> wrote:
</pre>
      <blockquote type="cite">
        <pre wrap="">Hi Stackers,

I am encountering a problem when i do this: apt-get -y install nova-common
nova-compute nova-volume nova-vncproxy nova-api nova-ajax-console-proxy
nova-cert nova-consoleauth nova-doc nova-scheduler nova-network

It replies back with : The following packages have unmet dependencies:
 nova-vncproxy : Depends: nova-common (=
2012.2+git201209200431~precise-0ubuntu1) but
2012.2+git201209250431~precise-0ubuntu1 is to be installed
E: Unable to correct problems, you have held broken packages.


Does anyone have an idea how to fix this ?
</pre>
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      <pre wrap=""><SNIP>

Where are you trying to install this from?

The following output would be helpful, please:
$ apt-cache policy nova-common

</pre>
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    This is what  apt-cache policy nova-common is giving me :<br>
    ======================================<br>
    nova-common:<br>
      Installed: 2012.2-0ubuntu3~cloud0<br>
      Candidate: 2012.2-0ubuntu3~cloud0<br>
      Version table:<br>
     *** 2012.2-0ubuntu3~cloud0 0<br>
            500 <a class="moz-txt-link-freetext" href="http://ubuntu-cloud.archive.canonical.com/ubuntu/">http://ubuntu-cloud.archive.canonical.com/ubuntu/</a>
    precise-updates/folsom/main amd64 Packages<br>
            100 /var/lib/dpkg/status<br>
         2012.1.3+stable-20120827-4d2a4afe-0ubuntu1 0<br>
            500 <a class="moz-txt-link-freetext" href="http://us.archive.ubuntu.com/ubuntu/">http://us.archive.ubuntu.com/ubuntu/</a>
    precise-updates/main amd64 Packages<br>
         2012.1+stable~20120612-3ee026e-0ubuntu1.3 0<br>
            500 <a class="moz-txt-link-freetext" href="http://security.ubuntu.com/ubuntu/">http://security.ubuntu.com/ubuntu/</a> precise-security/main
    amd64 Packages<br>
         2012.1-0ubuntu2 0<br>
            500 <a class="moz-txt-link-freetext" href="http://us.archive.ubuntu.com/ubuntu/">http://us.archive.ubuntu.com/ubuntu/</a> precise/main amd64
    Packages<br>
    ========================================<br>
    <br>
    i am following the
    <a class="moz-txt-link-freetext" href="http://docs.openstack.org/trunk/openstack-compute/install/apt/content/">http://docs.openstack.org/trunk/openstack-compute/install/apt/content/</a>
    install guide so i am installing using the <u><b>deb
        <a class="moz-txt-link-freetext" href="http://ubuntu-cloud.archive.canonical.com/ubuntu">http://ubuntu-cloud.archive.canonical.com/ubuntu</a>
        precise-updates/folsom main</b></u><u><br>
      <br>
    </u>I am not the only one experiencing this problem, check this :
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    <a href="https://answers.launchpad.net/nova/+question/210171">https://answers.launchpad.net/nova/+question/210171</a>
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