I am trying to upgrade from fc6 to f7.

I have updated all the present packages using yum.
But after updating with f7 release package and then when I update using yum Im getting following error message

Error: Missing Dependency: libpython2.4.so.1.0 is needed by package kdeutils
Error: Missing Dependency: libgcj.so.8rh is needed by package libgconf-java
Error: Missing Dependency: python(abi) = 2.4 is needed by package python-virtinst
Error: Missing Dependency: libnetsnmp.so.10 is needed by package libsane-hpaio


Tried after downloading this package, but still it shows same error.

Please help

Fedora's official advice is still to always do a clean install. Support for F7 was dropped well over a year ago (no official updates of any kind since then). When F11 is released (April?) support for F9 will be dropped (F8 support was dropped when F10 came out). If you are having issues keeping up with Fedora's release cycle you might want to consider Centos. Centos is RHEL(Red Hat Enterprise Linux) with the logos removes. RHEL/Centos 5.2 (current today) was based on FC6 and is free to download/update (unlike RHEL). It has a five year plus support life.