update manager giving error

getting following eror

Have used all the commands from the the package manager trouble shooting procedure - community ubuntu documentation yet the error badly stuck please help

myself@myself-VGN-CS21GN-B:~$ LAND=C ; sudo apt-get --purge autoremove
Reading package lists... Error!
E: Problem parsing dependency Depends
E: Error occurred while processing kde-runtime (NewVersion2)
E: Problem with MergeList /var/lib/dpkg/status
E: The package lists or status file could not be parsed or opened.
myself@myself-VGN-CS21GN-B:~$