F17: Your current installation cannot be upgraded

[phedora]

System runs F16 fine. Has boot partition on /dev/sda1, Standard LVM created by some Fxx install on /dev/sda2 with a swap and root logical volumes. Updated from xx through 16 with yum update with no problems ever.
Going to F17 via DVD I get "your current installation cannot be upgraded". Looking through the several consoles I see a message of Product None Release None or something like that and on another a couple of messages with 0 logical volumes available on my volume group.

Tried preupgrade from F16 but /boot only has 200 MB and thus won't go. Forcing stage2 doesn't work as I'm behind transparent firewall and need to get a fixed IP to be able to get out and when booting under dhcp I get a different one that can't get out.

Stuck, anyway out of this?

[george_toolan]

Which version of Fedora 16 are you running 32 bit or 64 bit and which version of Fedora 17 are you trying to install? Try

uname -a

You probably can't cross upgrade from a 32 bit version to a 64 bit version or vice versa.

[phedora]

Turns out that in some systems /etc/redhat-release is symlinked to /etc/fedora-release (absolute path) instead of to fedora-release (relative path) and under anaconda the absolute link doesn't work.

I had that in two of my systems, two other were fine. All systems had a fresh install of some Fxx and were yum upgraded till now, so I think it depends on which version the first install was, but can't be sure.