Thank you for taking the time to report this issue and helping to make
Ubuntu better. Examining the information you have given us, this does
not appear to be a bug report so we are closing it and converting it to
a question in the support tracker. We understand the difficulties you
are facing, but it is better to raise problems you are having in the
support tracker at https://answers.launchpad.net/ubuntu if you are
uncertain if they are bugs. You can also find a valid help posting your
problem in the support forum of your local Ubuntu's community
http://loco.ubuntu.com/ or asking at http://askubuntu.com. For help on
reporting bugs, see https://help.ubuntu.com/community/ReportingBugs.
simply, try to remove the ppa you added. plus this upgrading from 11.04 to
12.04 is not officially supported, even if possible.
** Changed in: ubuntu
Status: New => Invalid
** Converted to question:
https://answers.launchpad.net/ubuntu/+question/202432
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https://bugs.launchpad.net/bugs/1020943
Title:
I cannot upgrade Ubuntu 11.04 to 12.04. Update manager crashes and
shows me this: W:Failed to fetch http://ppa.launchpad.net/lorenzo-
carbonell/atareao/ubuntu/dists/natty/main/source/Sources 404 Not
Found , W:Failed to fetch http://ppa.launchpad.net/lorenzo-
carbonell/atareao/ubuntu/dists/natty/main/binary-i386/Packages 404
Not Found , E:Some index files failed to download. They have been
ignored, or old ones used instead.
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