Setting new software channels step I get this error
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.
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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