I have just updated to susy 2.1.2 from version 1.0.9 so I expected errors.

However, I have no idea what this means.

I do still have both versions installed:

```
Select gem to uninstall:
 1. susy-1.0.9
 2. susy-2.1.2
 3. All versions

```

When running my `compass:dev` I get the following, although the task still finished. How can I remove the erorrs?

```
Running "compass:dev" (compass) task
C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:135:in `require': cannot load such file -- sass/script/node (LoadError)
        from C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:135:in `rescue in require'
        from C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:144:in `require'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/lib/compass/sass_extensions/monkey_patches/browser_support.rb:1:in `<top (required)>'
        from C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/lib/compass/sass_extensions/monkey_patches.rb:2:in `block in <top (required)>'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/lib/compass/sass_extensions/monkey_patches.rb:1:in `each'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/lib/compass/sass_extensions/monkey_patches.rb:1:in `<top (required)>'
        from C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/lib/compass/sass_extensions.rb:9:in `<top (required)>'
        from C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/lib/compass.rb:5:in `block in <top (required)>'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/lib/compass.rb:4:in `each'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/lib/compass.rb:4:in `<top (required)>'
        from C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from C:/RUBY200/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/bin/compass:20:in `block in <top (required)>'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/bin/compass:8:in `fallback_load_path'
        from C:/RUBY200/lib/ruby/gems/2.0.0/gems/compass-0.12.2/bin/compass:19:in `<top (required)>'
        from C:/Ruby200/bin/compass:23:in `load'
        from C:/Ruby200/bin/compass:23:in `<main>'

Running "watch" task
Waiting...

```