# Failing rio#mkdir in rio-0.3.4

**URL:** <https://www.ruby-forum.com/t/failing-rio-mkdir-in-rio-0-3-4/51369>\
**Category:** Ruby\
**Created:** [December 30, 2005, 9:34am UTC](https://www.ruby-forum.com/t/failing-rio-mkdir-in-rio-0-3-4/51369 "2005-12-30T09:34:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![wybodekker](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/w/f05b48/32.png) [@wybodekker](https://www.ruby-forum.com/u/wybodekker)\
**Post date:** [December 30, 2005, 9:34am UTC](https://www.ruby-forum.com/t/failing-rio-mkdir-in-rio-0-3-4/51369/1 "2005-12-30T09:34:38Z")

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This seems quite basic to me, and it worked with rio-0.3.3:

require ‘rubygems’  
require ‘rio’  
rio(“test”).mkdir

But with rio-0.3.4 it says:

/usr/local/lib/ruby/gems/1.8/gems/rio-0.3.4/lib/rio/ops/dir.rb:77:  
uninitialized constant RIO::Ops::FileOrDir::ExistOrNot (NameError)

my ruby is:  
ruby 1.8.4 (2005-12-24) [i686-linux]

---

<div class="post-metadata">

**Author:** ![wybodekker](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/w/f05b48/32.png) [@wybodekker](https://www.ruby-forum.com/u/wybodekker)\
**Post date:** [January 1, 2006, 10:58pm UTC](https://www.ruby-forum.com/t/failing-rio-mkdir-in-rio-0-3-4/51369/2 "2006-01-01T22:58:58Z")

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Is there anybody on this list with:

ruby 1.8.3 or 1.8.4 and  
rio-0.3.4

who can run this:

require ‘rubygems’  
require ‘rio’  
p rio(??).mkdir.path

without getting an error message?