I had this same issue with 64 bit commercial software from Codeweavers. Try the following:
apt-get install multiarch-support
If that doesn't allow you to install (it didn't work for me). Try this:
dpkg --add-architecture i386
dpkg -i icaclient_12.1.0_amd64.deb
apt-get -f install
In my case, the "apt-get -f install" resulted in a bunch of i386 packages being installed, but after that I was able to install my deb file. Honestly, I haven't had the time to read and learn about what is going on here, but the above steps worked for me and everything appears to be functioning as it should. It appears that ia32-libs are somewhat deprecated, but the ia32-libs package was a dependency and was installed on my system at the end with "apt-get -f install".