Hello! I have found alredy some topics about my problem but I didnt understand how it should be fixed. Sorry =) I was following http://ruby.railstutorial.org/chapters/filling-in-the-layout#fnref-5_5 tutorial and stuck by importing the bootstrap in app/assets/stylesheets/custom.css.scss. That is my Gemfile: source ''https://rubygems.org'' gem ''bootstrap-sass'', ''2.0.4'' gem ''rails'', ''3.2.8'' group :development, :test do gem ''sqlite3'', ''1.3.5'' gem ''rspec-rails'', ''2.11.0'' end group :assets do gem ''sass-rails'', ''3.2.5'' gem ''coffee-rails'', ''3.2.2'' gem ''uglifier'', ''1.2.3'' end gem ''jquery-rails'', ''2.0.2'' group :test do gem ''capybara'', ''1.1.2'' end group :production do gem ''pg'', ''0.12.2'' end And what error I get on localhost/sample_app/home Sass::SyntaxError in Static_pages#home Showing c:/Users/katja/Arbeit/rails_projects/sample_app/app/views/layouts/application.html.erb where line #5 <https://github.com/thomas-mcdonald/bootstrap-sass/issues/5> raised: File to import not found or unreadable: bootstrap. Load path: Sass::Rails::Importer(c:/Users/katja/Arbeit/rails_projects/sample_app/app/assets/stylesheets/custom.css.scss) (in c:/Users/katja/Arbeit/rails_projects/sample_app/app/assets/stylesheets/custom.css.scss) Extracted source (around line #5<https://github.com/thomas-mcdonald/bootstrap-sass/issues/5> ): 2: 3: 4: <%= full_title(yield(:title)) %> 5: <%= stylesheet_link_tag "application", media: "all" %> 6: <%= javascript_include_tag "application" %> 7: <%= csrf_meta_tags %> 8: <!--[if lt IE 9]> Rails.root: c:/Users/katja/Arbeit/rails_projects/sample_app Application Trace | Framework Trace | Full Trace app/assets/stylesheets/custom.css.scss:1 app/views/layouts/application.html.erb:5:in `app_views_layouts_application_html_erb_16020705_20168520'' I have tried to remove tmp/cache folder, it didnt help. Everything works before adding @import "bootstrap"; into custom.css.scss. After it works nothing. Thank you in Advanced -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msg/rubyonrails-talk/-/l05LDtCQ5ukJ. For more options, visit https://groups.google.com/groups/opt_out.