# New rails app post upgrade to rails 3 : Uninitialized constant bundler

**URL:** <https://www.ruby-forum.com/t/new-rails-app-post-upgrade-to-rails-3-uninitialized-constant-bundler/201458>\
**Category:** Deployment\
**Created:** [January 7, 2011, 7:37pm UTC](https://www.ruby-forum.com/t/new-rails-app-post-upgrade-to-rails-3-uninitialized-constant-bundler/201458 "2011-01-07T19:37:28Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\
**Post date:** [January 7, 2011, 7:37pm UTC](https://www.ruby-forum.com/t/new-rails-app-post-upgrade-to-rails-3-uninitialized-constant-bundler/201458/1 "2011-01-07T19:37:28Z")

</div>

Below is the Passenger backtrace to an app I’m making in the Agile Web  
Development Tutorial. I’m at the Hello World point. Nothing fancy. The  
server it’s on is hosting an older rails application that is still  
working properly. I already tried reinstalling the bundler. Here’s the  
trace:

![](http://i.imgur.com/Hivh1.jpg)

```
RubyGems Environment:
  - RUBYGEMS VERSION: 1.3.7
  - RUBY VERSION: 1.8.7 (2010-08-16 patchlevel 301) [x86_64-linux]
  - INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/1.8
  - RUBY EXECUTABLE: /usr/local/bin/ruby
  - EXECUTABLE DIRECTORY: /usr/local/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /usr/local/lib/ruby/gems/1.8
     - /root/.gem/ruby/1.8
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
     - "gem" => "--no-ri --no-rdoc"
     - :sources => ["http://gemcutter.org",

```

“[http://gems.rubyforge.org](http://gems.rubyforge.org)”]  
- REMOTE SOURCES:  
- [http://gemcutter.org](http://gemcutter.org)  
- [http://gems.rubyforge.org](http://gems.rubyforge.org)  
[root@apvdbs03 ~]# rails -v  
Rails 3.0.3  
[root@apvdbs03 ~]#