It's my first time using Koala.
Everything works fine so far, but when I want to use variables it starts giving me errors. I really don't know what I'am doing wrong, cause I followed all steps.
The actual problem with the code is that you supplied
5 digits for the value of a
You should either use
6 and not
$test: #000000; // not #00000
The reason why it worked by not importing
_variables.scss is because it is a partial file and by not importing it, it never gets compiled and so it basically doesn't evaluate the line causing the error. That line is just ignored.