# Uninitialized constant ActionController

**URL:** <https://www.ruby-forum.com/t/uninitialized-constant-actioncontroller/134810>\
**Category:** Ruby\
**Created:** [April 15, 2008, 11:22am UTC](https://www.ruby-forum.com/t/uninitialized-constant-actioncontroller/134810 "2008-04-15T11:22:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Tae\_Hyeon\_Choe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/7cd45c/32.png) [@Tae\_Hyeon\_Choe](https://www.ruby-forum.com/u/Tae_Hyeon_Choe)\
**Post date:** [April 15, 2008, 11:22am UTC](https://www.ruby-forum.com/t/uninitialized-constant-actioncontroller/134810/1 "2008-04-15T11:22:29Z")

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Hi~!

I’m start RoR. but meet error when first program…

Help me…

Error Message :

copy output  
RubyMate r8136 running Ruby r1.8.6 (/opt/local/bin/ruby)

> > > application.rb

NameError: uninitialized constant ActionController

at top level in application.rb at line 4  
Program exited.

Code :

class PhonebookController \< ApplicationController  
scaffold :person  
end

---

<div class="post-metadata">

**Author:** ![Tae\_Hyeon\_Choe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/7cd45c/32.png) [@Tae\_Hyeon\_Choe](https://www.ruby-forum.com/u/Tae_Hyeon_Choe)\
**Post date:** [April 16, 2008, 6:37am UTC](https://www.ruby-forum.com/t/uninitialized-constant-actioncontroller/134810/2 "2008-04-16T06:37:47Z")

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Yeah you’ll want to run script/server or script/console.

> at top level in application.rb at line 4  
> Program exited.  
> maybe start a new rails project and start from scratch?