# IRB won't work

**URL:** <https://www.ruby-forum.com/t/irb-wont-work/149218>\
**Category:** Rails\
**Created:** [September 22, 2008, 4:18pm UTC](https://www.ruby-forum.com/t/irb-wont-work/149218 "2008-09-22T16:18:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![MCMCMC](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/a3d4f5/32.png) [@MCMCMC](https://www.ruby-forum.com/u/MCMCMC)\
**Post date:** [September 22, 2008, 4:18pm UTC](https://www.ruby-forum.com/t/irb-wont-work/149218/1 "2008-09-22T16:18:37Z")

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I am a newb. Running OS X leopard. Installed ruby, rails, mysql  
through macports. Everything works fine except today I tried to run  
the irb console. I get the following:

computer: mark$ ruby script/console  
Loading development environment (Rails 2.1.0)  
dyld: NSLinkModule() error  
dyld: Symbol not found: \_rl\_completion\_matches  
Referenced from: /usr/local/lib/ruby/1.8/powerpc-darwin9.4.0/  
readline.bundle  
Expected in: flat namespace

Trace/BPT trap

computer: mark$ ruby -v  
ruby 1.8.6 (2007-09-24 patchlevel 111) [powerpc-darwin9.4.0]

Any ideas?

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<div class="post-metadata">

**Author:** ![MCMCMC](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/a3d4f5/32.png) [@MCMCMC](https://www.ruby-forum.com/u/MCMCMC)\
**Post date:** [September 22, 2008, 6:56pm UTC](https://www.ruby-forum.com/t/irb-wont-work/149218/2 "2008-09-22T18:56:54Z")

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All my responses are the same as yours. Just no irb.  
Can irb be reinstalled by itself or maybe I should just reinstall ruby  
again?

On Sep 22, 7:32 am, Rob B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)

---

<div class="post-metadata">

**Author:** ![MCMCMC](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/a3d4f5/32.png) [@MCMCMC](https://www.ruby-forum.com/u/MCMCMC)\
**Post date:** [September 22, 2008, 4:33pm UTC](https://www.ruby-forum.com/t/irb-wont-work/149218/3 "2008-09-22T16:33:19Z")

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On Sep 22, 2008, at 10:09 AM, MC wrote:

> I am a newb. Running OS X leopard.  
> OK.

> Installed ruby, rails, mysql  
> through macports.  
> Huh? If you’re running Leopard, you should have ruby and rails  
> already! You may have a conflict:

rab:Users/rab $ which ruby  
/usr/bin/ruby  
rab:Users/rab $ ruby -v  
ruby 1.8.6 (2008-03-03 patchlevel 114) [universal-darwin9.0]

rab:Users/rab $ which rails  
/usr/bin/rails  
rab:Users/rab $ rails -v  
Rails 2.1.0

> Trace/BPT trap
> 
> computer: mark$ ruby -v  
> ruby 1.8.6 (2007-09-24 patchlevel 111) [powerpc-darwin9.4.0]
> 
> Any ideas?

I hope that gives you a starting point.

-Rob

Rob B. [http://agileconsultingllc.com](http://agileconsultingllc.com)  
removed\_email\_address@domain.invalid