Setting new software channels step I get this error

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qa-featured

Hello,

I'd like to upgrade to 12.04. I'm using the Update Manager to do so.

It gets to the "Setting new software channels" step when I get this error?

I am here for a proper solution and suggestion from experts.

Please help me.

Thanks in advance.

A problem occurred during the update. This is usually some sort of network problem, please check your network connection and retry.

Error during update

A problem occurred during the update.

This is usually some sort of network problem, please check your network connection and retry.

W:Failed to fetch cdrom://Ubuntu 12.04LTS_PRECISE PANGO
W:Failed to fetch cdrom://Ubuntu 12.04LTS_PRECISE PANGO

E:Some index files failed to download. They have been ignored,

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Answered By 0 points N/A #176306

Setting new software channels step I get this error

qa-featured

Hi Eugene,
The error is because some packages for software upgrade are missing.
The error can be resolved by following the steps below:
1) Click 'Update Manager', Click 'Check' , Click 'Install Update'
2) Under the 'Updates' tab, select Notify me when a new Ubuntu version as 'For any new version'

 Ubuntu-software-source-upgrade-window

3) Click on 'Upgrade', you will receive a welcome window
4) Select 'Start Upgrade'
5) After the upgrade is complete, Ubuntu will installed updated packages on the system

 Ubuntu-package-upgrade-window

6) You will be prompted to remove obsolete packages, Click 'Remove'

Remove-obsolete-packages-from-ubuntu-software

7) After the removal of packages, you need to restart the system
8) Click 'Restart Now' to complete the upgrade

 Restart-window-to-complete-the-upgrade

 

 

 

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