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I have been programming Java in NetBeans for a long while, but I just bought the book “Using JRuby” (really well-written) and came to the point where the example in the book needed the gem Rubeus. I downloaded it, went to Tools/Ruby Gems in NetBeans, and managed to get it installed (or so it appeared) successfully. Then I tried to run the example code, but I get the nastygram below:

/jruby1.6/lib/ruby/site_ruby/1.8/rubygems.rb:812:in report_activate_error’: Could not find RubyGem activesupport (= 2.1.2) (Gem::LoadError) from /jruby1.6/lib/ruby/site_ruby/1.8/rubygems.rb:223:inactivate'

(and further stack trace lines)

So apparently a gem needs to be activated, even after it’s installed. How do I do that?

Thanks in advance for any help.

John Doner

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I don't think that error has anything to do with Rubeus, but I don't know what Rubeus does. It's complaining that it can't find the ActiveSupport gem.

You do not need to active gems. Typically you install them on the command line with gem install some_gem

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