From: Dane Jensen <dane.jensen@...>
Date: 2010-02-21T13:18:00+09:00
Subject: Re: Running two versions of Ruby - Lessons Learned

On Feb 20, 2010, at 5:50 PM, Alex DeCaria  
<alex.decaria@millersville.edu> wrote:
> - For thos few programs that need to run under Ruby 1.8 I wrote a  
> simple
> ruby script that calls the Kernel.system method:
>
> system( "C:\Ruby\bin\rubyw.exe my_Ruby1.8_program.rb" )

You should use exec instead. system runs the script as a sub process  
with your wrapper just sitting in memory waiting for it to exit. exec  
replaces your wrapper with the called script.

-Dane