The sass framework contains the following errors, you can't follow the tutorials in your book.

[Luke249260531nm9]

upon attempting the lesson 4 working with code in your book. I get the following error and have determined the problem is in your framework, not what I've attempted.

states Undefined variable: "$halvetica" when they wrote the css files that the sass frameworks works with they forgot to define the variable. I would fix it myself, but I shouldn't have to.

[Nancy OShea]

I don't know what Chapter 4 means.  😕

What exact steps are you taking to arrive at this error message?  I've never encountered it.

Helvetica is a common sans-serif font found on Mac systems. Most Windows users don't have it.