If you are using conky-lua in Arch Linux you may experience the following error. I have my conkys set up in my OpenBox menu and when selected they were not coming up. When I tried to run them via the command line I received the following error:
conky: error while loading shared libraries: libiw.so.29: cannot open shared object file: No such file or directory
2 Days ago, a bug was created: https://bugs.archlinux.org/task/38813 but it was deemed not a bug.
Seems as if you downgrade wirelesstools; downgrading to version 29-8 conky starts working again. I have confirmed this to be true. Provided you have not recently run pacman -Scc the older package should be in /var/cache/pacman/pkg
Just run the following to downgrade from wirelesstools version 30.pre9-1
# pacman -U /var/cache/pacman/pkg/wirelesstools-29-8-x86_64.pkg.tar.xz
And Conky will start running again.
Edit: Forgot to mention, if you are running 32 bit Arch Linux, the file name will be different, just search /var/cache/pacman/pkg, run -ls and find the correct file name for wirelesstools-29-8 running the same code as above but with the correct file name after /pkg/.