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Editorial Team
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Asked: 2026-06-17T11:07:17+00:00

I recently installed Ruby on my Windows PC. I also installed Jruby. After that

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I recently installed Ruby on my Windows PC.
I also installed Jruby. After that I installed Rails using gems.
So when I tried to execute “rails server” on CMD an error would crop up saying “Cannot find JDK” or something like that. So I installed Jruby.
Now I get “Cannot find Jruby.”

Can someone point out what I need to do?

[edit]
I want to be able to use rails normally, without all the hassle created by Jruby installation.

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1 Answer

  1. Editorial Team

    It sounds like you have some JRuby remnants in your PATH variable somewhere. if you checked your PATH then possibly a gem is installed as a JRuby gem or is locked as a JRuby gem in your bundle.

    Possibly your RubyGems Environment is messed up. Try running gem env and look for anything out of the ordinary.

    Anyway, try updating your bundle or checking your bundle’s platform (bundle platform).

    If neither of those work using where.exe rails will get you a match of all the rails batch files you can call from your PATH and you can debug it from there.

    Just a note: There shouldn’t be anything you need to muck with in registry, most everything you might need is probably in your environment variables

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