# Eroor when i launch visual ruby

**URL:** <https://www.ruby-forum.com/t/eroor-when-i-launch-visual-ruby/244774>\
**Category:** Ruby-Gnome 2\
**Created:** [June 12, 2016, 12:18pm UTC](https://www.ruby-forum.com/t/eroor-when-i-launch-visual-ruby/244774 "2016-06-12T12:18:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Rafa\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\
**Post date:** [June 12, 2016, 12:18pm UTC](https://www.ruby-forum.com/t/eroor-when-i-launch-visual-ruby/244774/1 "2016-06-12T12:18:18Z")

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when i try to launch visual ruby i have these error

Gtk-WARNING \*\*:Theme parsing error: gtk-main.css:69:33: Failed to  
import: Произошла ошибка при открытии файла: Нет такого файла или  
каталога  
/var/lib/gems/2.3.0/gems/gobject-introspection-3.0.8/lib/gobject-introspection/loader.rb:37:in  
`require’: Typelib file for namespace ‘GtkSource’ (any version) not  
found (GLib::Error)

how i can fix this?

---

<div class="post-metadata">

**Author:** ![begun](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/a5b964/32.png) [@begun](https://www.ruby-forum.com/u/begun)\
**Post date:** [June 13, 2016, 5:12am UTC](https://www.ruby-forum.com/t/eroor-when-i-launch-visual-ruby/244774/2 "2016-06-13T05:12:04Z")

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Hi:

I’m not sure what that error means. Does it have more at the bottom,  
perhaps with line numbers etc? Please post the entire error, maybe that  
will help.

It might be having trouble loading gtksourceview3. Try manually  
installing it like so:

gem install gtk3  
gem install gtksourceview3

It seems to be complaining about GtkSource which is a part of  
gtksourceview3.

I uploaded a new gem, so you can try it too:

gem install visualruby

Let me now if any of this helps.

Best,  
Eric