I'm trying to start a new rails app and for some reason my computer is no longer recognising rails....it's been working fine on every other rails app I've been working on until now.
When I typed;
rails new test_app -d postgresql -T
It threw up this error:
/home/camillavk/.rvm/gems/ruby-2.1.5/bin/rails:23:in `load': cannot load such file -- /home/camillavk/.rvm/gems/ruby-2.1.5/gems/rails-4.2.0/bin/rails (LoadError)
        from /home/camillavk/.rvm/gems/ruby-2.1.5/bin/rails:23:in `<main>'
        from /home/camillavk/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `eval'
        from /home/camillavk/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `<main>'
The same error is being thrown when I type rails -v. But when I type which rails I get 
/home/camillavk/.rvm/gems/ruby-2.1.5/bin/rails
I then tried to run gem install rails and all it says is 1 gem installed
Any ideas on why rails is doing this on my computer and how to fix it?
*EDIT
gem env:
RubyGems Environment:
  - RUBYGEMS VERSION: 2.4.5
  - RUBY VERSION: 2.1.5 (2014-11-13 patchlevel 273) [x86_64-linux]
  - INSTALLATION DIRECTORY: /home/camillavk/.rvm/gems/ruby-2.1.5
  - RUBY EXECUTABLE: /home/camillavk/.rvm/rubies/ruby-2.1.5/bin/ruby
  - EXECUTABLE DIRECTORY: /home/camillavk/.rvm/gems/ruby-2.1.5/bin
  - SPEC CACHE DIRECTORY: /home/camillavk/.gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: /home/camillavk/.rvm/rubies/ruby-2.1.5/etc
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /home/camillavk/.rvm/gems/ruby-2.1.5
     - /home/camillavk/.rvm/gems/ruby-2.1.5@global
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
     - "gem" => "--no-rdoc --no-ri"
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:
     - /home/camillavk/.rvm/gems/ruby-2.1.5/bin
     - /home/camillavk/.rvm/gems/ruby-2.1.5@global/bin
     - /home/camillavk/.rvm/rubies/ruby-2.1.5/bin
     - /usr/local/sbin
     - /usr/local/bin
     - /usr/sbin
     - /usr/bin
     - /sbin
     - /bin
     - /usr/games
     - /usr/local/games
     - /home/camillavk/bin
     - /usr/local/java/jdk1.8.0_25/bin
     - /home/camillavk/.rvm/bin
     - /usr/local/sbin
     - /usr/local/bin
     - /usr/sbin
     - /usr/bin
     - /sbin
     - /bin
     - /usr/games
     - /usr/local/games
     - /home/camillavk/.rvm/bin
 
     
     
    