Unable to run irb in Power Shell to learn Ruby, please help

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Justin McMurtrey

Oct 2, 2020, 3:36:52 AM10/2/20
to RubyInstaller
I am on Windows 10 and just downloaded  Ruby+Devkit 2.6.6-1 (x64)  but after I downloaded and installed I am unable to run IRB interactively in powershell. It worked a few months ago, I have no clue what changed and what's causing this, please help. Thanks.

PS C:\Users\ZZM9LC\Documents\Ruby> ruby -v
ruby 2.6.6p146 (2020-03-31 revision 67876) [x64-mingw32]
PS C:\Users\ZZM9LC\Documents\Ruby> irb
Traceback (most recent call last):
        4: from C:/Ruby26-x64/bin/irb.cmd:31:in `<main>'
        3: from C:/Ruby26-x64/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        2: from C:/Ruby26-x64/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        1: from C:/Ruby26-x64/lib/ruby/site_ruby/2.6.0/irbrc_predefiner.rb:6:in `<top (required)>'
C:/Ruby26-x64/lib/ruby/site_ruby/2.6.0/irbrc_predefiner.rb:6:in `write': No such file or directory @ rb_sysopen - H://.irbrc (Errno::ENOENT)
PS C:\Users\ZZM9LC\Documents\Ruby>


Lars Kanis

Oct 4, 2020, 12:08:19 PM10/4/20
to RubyInstaller
Sorry you're having problems with RubyInstaller! The error message says that it failed to write a file on your H drive. Apparently that drive seems to have disappeared.

You should check your system and user environment variables in the Windows system settings. There must be a reference to the H drive in some variable like "HOME" or "HOMEDRIVE". It probably has to be replaced with a drive letter that is available.

Regards, Lars

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