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Editorial Team
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Asked: 2026-05-23T00:31:38+00:00

When attempting to create a new Ruby on Rails app in Windows the command

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When attempting to create a new Ruby on Rails app in Windows the command 

rails new test_app

returns an error 

'rails' is not recognized as an internal or external command, operable program 
or batch  file

but the command

rails.bat new test_app

works just fine. I have added the ..\ruby\bin directory to my PATH variable but it doesn’t seem to change anything. A similar problem occurs for all other ‘rails’ commands as well as for ‘rake’ vs ‘rake.bat’.

Running type rails.bat returns:

@ECHO OFF
IF NOT "%~f0" == "~f0" GOTO :WinNT
@"ruby.exe" "C:/_LOCALdata/Ruby192/bin/rails" %1 %2 %3 %4 %5 %6 %7 %8 %9
GOTO :EOF
:WinNT
@"ruby.exe" "%~dpn0" %*
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1 Answer

  1. Editorial Team

    From your updated question I can assume that PATHEXT, the environment variable responsible for knowing files to be executed without extensions is missing .BAT from it.

    To confirm, please do SET PATHEXT on a new command prompt and see the output, the result should be a semi-colon separated values that include .EXE, .BAT, .COM and perhaps .RB

    If PATHEXT is empty or do not contain .BAT in it, that could explain why is not working.

    Depending on your version of Windows, the installation of RubyInstaller might have caused that, in which case I recommend uninstall and verify the environment variables to see if it get restored.

    Then try to install it again.

    See this thread on RubyInstaller about this.

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