# Errors When Attempting "irb"

**URL:** <https://www.ruby-forum.com/t/errors-when-attempting-irb/133098>\
**Category:** Ruby\
**Created:** [March 27, 2008, 5:55pm UTC](https://www.ruby-forum.com/t/errors-when-attempting-irb/133098 "2008-03-27T17:55:37Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jacobly](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/4da419/32.png) [@jacobly](https://www.ruby-forum.com/u/jacobly)\
**Post date:** [March 27, 2008, 5:55pm UTC](https://www.ruby-forum.com/t/errors-when-attempting-irb/133098/1 "2008-03-27T17:55:37Z")

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I am unable to use ruby’s interactive shell because of this ugly thing:

dyld: NSLinkModule() error  
dyld: Symbol not found: \_rl\_filename\_completion\_function  
Referenced from:  
/usr/local/lib/ruby/1.8/i686-darwin9.2.2/readline.bundle  
Expected in: flat namespace

Trace/BPT trap

anybody? It all started when I tried installing ruby 1.9 from source…

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**Author:** ![jacobly](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/4da419/32.png) [@jacobly](https://www.ruby-forum.com/u/jacobly)\
**Post date:** [March 27, 2008, 6:00pm UTC](https://www.ruby-forum.com/t/errors-when-attempting-irb/133098/2 "2008-03-27T18:00:20Z")

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2008/3/27, Jacob L. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):

> anybody? It all started when I tried installing ruby 1.9 from source…  
> And is your irb version 1.9 too?

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<div class="post-metadata">

**Author:** ![jacobly](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/4da419/32.png) [@jacobly](https://www.ruby-forum.com/u/jacobly)\
**Post date:** [March 27, 2008, 11:32pm UTC](https://www.ruby-forum.com/t/errors-when-attempting-irb/133098/3 "2008-03-27T23:32:05Z")

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> anybody? It all started when I tried installing ruby 1.9 from source…

Have you removed 1.9 again?

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<div class="post-metadata">

**Author:** ![jacobly](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/4da419/32.png) [@jacobly](https://www.ruby-forum.com/u/jacobly)\
**Post date:** [March 29, 2008, 7:10pm UTC](https://www.ruby-forum.com/t/errors-when-attempting-irb/133098/4 "2008-03-29T19:10:01Z")

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Jacob L. wrote:

> I am unable to use ruby’s interactive shell because of this ugly thing:
> 
> dyld: NSLinkModule() error  
> dyld: Symbol not found: \_rl\_filename\_completion\_function  
> Referenced from:  
> /usr/local/lib/ruby/1.8/i686-darwin9.2.2/readline.bundle  
> Expected in: flat namespace
> 
> Trace/BPT trap
> 
> anybody? It all started when I tried installing ruby 1.9 from source…

There’s a supposed issue with leopard… but I’m too much a noob to 1)  
understand it fully and 2) follow directions to install a patch for it,  
so I took this opportunity to do a fresh install of leopard. All  
problems fixed and I’m sticking with ruby 1.8 for now.