# Rdoc/ri issue **URL:** \ **Category:** Ruby\ **Created:** [May 7, 2010, 1:18am UTC](https://www.ruby-forum.com/t/rdoc-ri-issue/188179 "2010-05-07T01:18:20Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![tcsnide](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/eb8c5e/32.png) [@tcsnide](https://www.ruby-forum.com/u/tcsnide)\ **Post date:** [May 7, 2010, 1:18am UTC](https://www.ruby-forum.com/t/rdoc-ri-issue/188179/1 "2010-05-07T01:18:20Z")
$ ri “String#to\_s” /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb:909:in `load_method': undefined method`[]’ for nil:NilClass (NoMethodError) from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 934:in `load_methods_matching' from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 788:in`find\_methods’ from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 787:in `each' from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 787:in`find\_methods’ from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 928:in `load_methods_matching' from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 642:in`display\_method’ from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 685:in `display_name' from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 710:in`display\_names’ from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 707:in `each' from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 707:in`display\_names’ from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 1021:in `run' from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb: 309:in`run’ from /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/bin/ri:5 from /usr/local/lib/site\_ruby/1.8/roll/ledger.rb:118:in `original_load' from /usr/local/lib/site_ruby/1.8/roll/ledger.rb:118:in`load’ from /usr/local/lib/site\_ruby/1.8/roll/ledger.rb:283:in `load' from /usr/local/lib/site_ruby/1.8/roll/kernel.rb:32:in`load’ from /usr/bin/ri:19 ---
**Author:** ![tcsnide](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/eb8c5e/32.png) [@tcsnide](https://www.ruby-forum.com/u/tcsnide)\ **Post date:** [May 7, 2010, 2:50am UTC](https://www.ruby-forum.com/t/rdoc-ri-issue/188179/2 "2010-05-07T02:50:48Z")
On May 6, 2010, at 16:17, Intransition wrote: > $ ri “String#to\_s” > /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb:909:in > `load_method': undefined method`[]’ for nil:NilClass (NoMethodError) Did you upgrade rdoc-data and reinstall it as well? The earlier documentation sets had bugs, 2.5.3 is the latest. ---
**Author:** ![tcsnide](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/eb8c5e/32.png) [@tcsnide](https://www.ruby-forum.com/u/tcsnide)\ **Post date:** [May 7, 2010, 7:18am UTC](https://www.ruby-forum.com/t/rdoc-ri-issue/188179/3 "2010-05-07T07:18:49Z")
On May 6, 8:50 pm, Eric H. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > On May 6, 2010, at 16:17, Intransition wrote: > > > $ ri “String#to\_s” > > /usr/lib/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ri/driver.rb:909:in > > `load_method': undefined method `[]’ for nil:NilClass (NoMethodError) > > Did you upgrade rdoc-data and reinstall it as well? The earlier documentation sets had bugs, 2.5.3 is the latest. Sure did. Tried it again to be sure: $ sudo gem install rdoc-data To install ri data for RDoc 2.5+ run: rdoc-data Successfully installed rdoc-data-2.5.3 1 gem installed Installing ri documentation for rdoc-data-2.5.3… Installing RDoc documentation for rdoc-data-2.5.3… $ sudo rdoc-data --install I get the same result.