I ran into an issue with my CLI sass –watch not compliling some new files the other day. I tried closing and reopening the bash window, clearing the .sass-cache as well as cancelling and restarting sass –watch with different paths.
In the end what worked was to delete the compiled .css and .map files. The compiler then reactivated and I was on my way. Hopefully this saves you an hour.
Don’t know about sass? You need to! Check it out on Sass-Lang.com