ERROR (from /usr/lib/snap/snap): error opening parameter file Ubuntu 14.04

I have just installed Snap on Ubuntu 14.04 using “sudo apt-get install snap”.   When I tried to install a snap, I got this error message:

ZOE ERROR (from /usr/lib/snap/snap): error opening parameter file
ZOE library version 2006-07-28

It turns out the you also need to install snapd.

sudo apt-get install snapd

Now it should just work.