I was able to use the steps in comment https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/153980/comments/81, but I had to NOT do the edit in step 5.
It seems like most of the trouble with upgrading an old 7.04 is because of the files being on old-releases.ubuntu.com instead of archive.ubuntu.com now.
I was able to use the steps in comment https:/ /bugs.launchpad .net/ubuntu/ +source/ update- manager/ +bug/153980/ comments/ 81, but I had to NOT do the edit in step 5.
It seems like most of the trouble with upgrading an old 7.04 is because of the files being on old-releases. ubuntu. com instead of archive.ubuntu.com now.