# Gems error

**URL:** <https://www.ruby-forum.com/t/gems-error/69998>\
**Category:** Ruby\
**Created:** [September 26, 2006, 9:21am UTC](https://www.ruby-forum.com/t/gems-error/69998 "2006-09-26T09:21:46Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Gaech](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/898d66/32.png) [@Gaech](https://www.ruby-forum.com/u/Gaech)\
**Post date:** [September 26, 2006, 9:21am UTC](https://www.ruby-forum.com/t/gems-error/69998/1 "2006-09-26T09:21:46Z")

</div>

Why error is happen?

> ruby -e “require ‘rubyclr’”  
> c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active\_support/dependencies.rb:123:in  
> `alias_const_missing': uninitialized constant IDataErrorInfo (NameError) from C:/rubyclr/Src/Ruby/core.rb:258:in`const\_missing’  
> from  
> c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active\_support/dependencies.rb:133:in  
> `send' from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in`const\_missing’  
> from C:/rubyclr/Src/Ruby/databinding.rb:30  
> from  
> c:/ruby/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
> `gem_original_require' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`require’  
> from  
> c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active\_support/dependencies.rb:147:in  
> `require' from C:/rubyclr/Src/Ruby/rubyclr.rb:21 from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`gem\_original\_require’  
> from  
> c:/ruby/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
> `require’  
> from -e:1