Monthly Archives: December 2012

Uninitialized constant ActiveSupport::Dependencies::Mutex (NameError)

This error may occur to run older Rails application for conflicting with rubygems version. After a long googling I’ve come out in to following three solutions: Using Bundler.:Click here if you are interested to see the solution. Changing rubygems version: Downgrade the rubygems to an earlier version using gem update –system {version} Add “require ‘thread’”…

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