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Home/ Questions/Q 3438868
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Editorial Team
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Editorial Team
Asked: May 18, 20262026-05-18T08:14:23+00:00 2026-05-18T08:14:23+00:00

In my env I require 3.0.3 but when I script/server I get this: can’t

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In my env I require 3.0.3

but when I script/server

I get this: can't activate rails (= 2.3.8, runtime) for [], already activated rails-3.0.3

I don’t want it to activate 2.3.8.. =\

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  1. Editorial Team
    Editorial Team
    2026-05-18T08:14:24+00:00Added an answer on May 18, 2026 at 8:14 am

    Rails 3.x doesn’t use script/server anymore – you should run your server with rails server or rails s. You can delete all the files from script, except for script\rails.

    Plus, you no longer specify your Rails version in environment.rb (if that’s what you mean by “env”). All gems and their versions are specified in your Gemfile.

    Did you follow a guide like Upgrading to Rails 3? It’s not enough to just change the Rails version in evironment.rb.

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