[arch-general] Failed to upgrade!!

[Madhurya Kakati]

hi,
When i tried to run "sudo pacman -Syu" today got the following output.

[papul at papuldesktop ~]$ sudo pacman -Syu
:: Synchronizing package databases...
 core is up to date
 extra is up to date
 community is up to date
 catalyst is up to date
 multilib is up to date
:: Starting full system upgrade...
resolving dependencies...
looking for inter-conflicts...
error: failed to prepare transaction (could not satisfy dependencies)
:: lib32-hal: requires lib32-dbus

Why cant i upgrade?? How do i install the mentioned dependency 'lib32-dbus'?

Thanks.