Undefined mixin: 'remove-omega' error in Susy 1.0.1 #121

TommiTikall opened this Issue Oct 10, 2012 · 5 comments


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When on PC I get this compiling error:

Change detected at 08:25:19 to: partials/_layout.scss
error screen.scss (Line 50 of _layout.scss: Undefined mixin 'remove-omega'.)

I am running my scss watch in command line.
I have uninstalled all ruby gems and re-installed all again, but I am still experiencing this error.
The strange part is, it works on my colleagues macs.


Is there any chance you still have compass-susy-plugin version 0.9 installed? Since 0.9 and 1.0 have different gem names, they conflict with each other if both are installed.

Hey Eric.
No I don't have that installed:

My CMD output:
*** LOCAL GEMS ***

bigdecimal (1.1.0)
chunky_png (1.2.6)
compass (0.12.2)
fssm (0.2.9)
io-console (0.3)
json (1.5.4)
minitest (2.5.1)
rake (
rdoc (3.9.4)
sass (3.2.1)
susy (1.0.1)


Perhaps Susy is perhaps not being imported at all? Do other mixins work? Do you have Susy required in your config.rb, and imported in your Sass?


Closing this unless I hear more about the issue.

@mirisuzanne mirisuzanne closed this Dec 2, 2012
kikaweb commented Jan 21, 2013

I'm experiencing the same problem reported months ago by @TommiTikall
I'm working on a Mac, Gem installed:

  • Susy 1.0.3
  • compass-susy-plugin 0.9 (1.0 is not installed)
  • sass 3.2.2

Susy is imported and other mixins work, but when I try to add the following lines:
.my-div {
@include columns(4,12);
@include remove-omega;
I get the following error:
error sass/screen.scss (Line 645 of sass/_skin.scss: Undefined mixin 'remove-omega'.)

Is there anything I forgot to include? In which file the mixin should be defined?

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