update manager is not woring Failed to download repository information

Posted by harry on Ask Ubuntu See other posts from Ask Ubuntu or by harry
Published on 2012-10-14T23:02:27Z Indexed on 2012/10/15 3:53 UTC
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Filed under:

updates

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update-manager

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repository

My update manager is not working and showing this message

Failed to download repository information

Check your Internet connection. W:Failed to fetch http://ppa.launchpad.net/pmcenery/ppa/ubuntu/dists/precise/main/source/Sources 404 Not Found , W:Failed to fetch http://ppa.launchpad.net/pmcenery/ppa/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found , E:Some index files failed to download. They have been ignored, or old ones used instead.

Pleas help

Thank you for your time.

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