fedup ??

[Jim]

Running fedup from F17 to upgrade to F18,  Is this the correct procedure ?
And I get the below Error message.

#  fedup-cli --iso /home/jim/Downloads/Fedora-18-i686-Live-KDE.iso 
--debuglog=fedupdebug.log
setting up repos...
Error: can't get boot images.
The 'fedupiso' repo was rejected by yum as invalid.


This the only thing in /var/log/messages when fedup-cli is run;

Feb 18 18:50:47 localhost dbus[581]: [system] Activating service 
name='net.reactivated.Fprint' (using servicehelper)
Feb 18 18:50:47 localhost dbus-daemon[581]: Launching FprintObject
Feb 18 18:50:47 localhost dbus-daemon[581]: dbus[581]: [system] 
Successfully activated service 'net.reactivated.Fprint'
Feb 18 18:50:47 localhost dbus[581]: [system] Successfully activated 
service 'net.reactivated.Fprint'
Feb 18 18:50:47 localhost dbus-daemon[581]: ** Message: D-Bus service 
launched with name: net.reactivated.Fprint
Feb 18 18:50:47 ost dbus-daemon[581]: ** Message: No devices in use, exit