Rails.vim, Rextract error: "no such directory"

My first attempt at using Rextract to create a partial failed. I’m
trying to edit the file:

views/layouts/application.html.erb

and create the partial:

views/layouts/_application.html.erb

In visual line mode, I selected the lines in application.html.erb that I
want to be in the partial. Then I typed ‘:’ which brought up:

:’<,’>

And I added:

:’<,’>Rextract stylesheets

But when I hit return, I was presented with an error message with a red
block around it at the bottom of my macvim window that says:

No such directory

====>
Ok, if I type:

:’<,’>Rextract layouts/stylesheets

then the partial file is created. Thanks.