# Undefined method \`each' for (installing gem)

**URL:** <https://www.ruby-forum.com/t/undefined-method-each-for-installing-gem/192367>\
**Category:** Ruby\
**Created:** [July 29, 2010, 5:01am UTC](https://www.ruby-forum.com/t/undefined-method-each-for-installing-gem/192367 "2010-07-29T05:01:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sonja\_Elen\_K](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d6d6ee/32.png) [@Sonja\_Elen\_K](https://www.ruby-forum.com/u/Sonja_Elen_K)\
**Post date:** [July 29, 2010, 5:01am UTC](https://www.ruby-forum.com/t/undefined-method-each-for-installing-gem/192367/1 "2010-07-29T05:01:00Z")

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I frequently get this error. Halp?

C:\Documents and Settings\Owner\My Documents\My Dropbox\Code\>gem install  
sinatra

Successfully installed sinatra-1.0  
1 gem installed  
Installing ri documentation for sinatra-1.0…  
Updating ri class cache with 2857 classes…  
Installing RDoc documentation for sinatra-1.0…  
ERROR: While generating documentation for sinatra-1.0  
… MESSAGE: Error while evaluating  
C:/Ruby191/lib/ruby/gems/1.9.1/gems/rdoc-2  
.3.0/lib/rdoc/generator/template/darkfish/classpage.rhtml: undefined  
method `eac  
h’ for #String:0x30cd9e0 (at “r”\>Namespace\n\t\t\t\t\<ul  
class=“link-lis  
t”\>\n\t\t\t\t\t")  
… RDOC args: lib README.rdoc LICENSE  
(continuing with the rest of the installation)

---

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**Author:** ![Sonja\_Elen\_K](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d6d6ee/32.png) [@Sonja\_Elen\_K](https://www.ruby-forum.com/u/Sonja_Elen_K)\
**Post date:** [July 30, 2010, 2:13am UTC](https://www.ruby-forum.com/t/undefined-method-each-for-installing-gem/192367/2 "2010-07-30T02:13:17Z")

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On Wed, Jul 28, 2010 at 10:01 PM, Sonja Elen K. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> Updating ri class cache with 2857 classes…  
> (continuing with the rest of the installation)  
> Try updating rdoc.