I get error message:in `tr': invalid byte sequence in UTF-8 (ArgumentError) when I run: ruby dk.rb init

Question

I have installed Ruby 1.92 in my computer, and would like to intall rails.

When I run: gem install rails, I get error message as below:

*D:\Ruby192\Devkit>gem install rails
*ERROR:  Error installing rails:
        The 'json' native gem requires installed build tools.
Please update your PATH to include build tools or download the DevKit
from 'http://rubyinstaller.org/downloads' and follow the instructions
at 'http://github.com/oneclick/rubyinstaller/wiki/Development-Kit'**

Then I download DevKit 4.5.2 or DevKit 3.5 and try them both as:

D:\Ruby192\Devkit>ruby dk.rb init

I always get error message:

d:/Ruby192/lib/ruby/1.9.1/win32/registry.rb:175:in `tr': invalid byte sequence in UTF-8 (ArgumentError)
        from d:/Ruby192/lib/ruby/1.9.1/win32/registry.rb:175:in `initialize'
        from d:/Ruby192/lib/ruby/1.9.1/win32/registry.rb:233:in `exception'
        from d:/Ruby192/lib/ruby/1.9.1/win32/registry.rb:233:in `raise'
        from d:/Ruby192/lib/ruby/1.9.1/win32/registry.rb:233:in `check'
        from d:/Ruby192/lib/ruby/1.9.1/win32/registry.rb:256:in `OpenKey'
        from d:/Ruby192/lib/ruby/1.9.1/win32/registry.rb:387:in `open'
        from d:/Ruby192/lib/ruby/1.9.1/win32/registry.rb:498:in `open'
        from dk.rb:118:in `block in scan_for'
        from dk.rb:116:in `each'
        from dk.rb:116:in `scan_for'
        from dk.rb:138:in `block in installed_rubies'
        from dk.rb:138:in `collect'
        from dk.rb:138:in `installed_rubies'
        from dk.rb:146:in `init'
        from dk.rb:313:in `run'
        from dk.rb:332:in `<main>'

Have you guys got any suggestion on the problem？

possible duplicate of [ruby 1.9: invalid byte sequence in UTF-8](http://stackoverflow.com/questions/2982677/ruby-1-9-invalid-byte-sequence-in-utf-8) — mu is too short, May 14 '12 at 02:15
do you have ruby or other things installed in a path with latin charecters in it? — pguardiario, May 14 '12 at 06:49

score 1 · Answer 1 · edited Jun 13 '12 at 13:56

1

I have encountered the same situation. I think that you may want to install json library. You should use msys.bat and install json on this terminal.

Execute msys.bat in a DevKit directory -> it invokes a new terminal.
gem install json on this terminal.
You can continue gem install rails.

edited Jun 13 '12 at 13:56

Maehler

6,111
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41
46

answered Jun 13 '12 at 02:27

m-kaz

11
1

score 1 · Answer 2 · answered Oct 20 '13 at 19:40

1

The problem was solved for me by clearing the LANG environment variable first:

set LANG=
ruby dk.rb init

The idea comes from this question on the RubyInstaller Google Group.

answered Oct 20 '13 at 19:40

Christian Davén

16,713
12
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I get error message:in `tr': invalid byte sequence in UTF-8 (ArgumentError) when I run: ruby dk.rb init

2 Answers2