Ruby 1.8 under windows 64 bits always return 0

Ruby
1

Hi

We have ruby scripts for our build infrastructure.
We are migrating slowly to windows 64 bits machine and I noticed a
strange behavior easily reproducible.

I have the script script.rb that contains the command “exit 3”

I open a command window
When I run ( with ruby 1.8.6 or ruby 1.8.7)the command “ruby script.rb”
on windows 32 bits machine and do echo %ERRORLEVEL%
I have the value 3 popping up as expected.

When I run ( with ruby 1.8.6 or ruby 1.8.7)the command “ruby script.rb”
on windows 64 bits machine and do echo %ERRORLEVEL%
I have the value 0 popping up as NOT expected.
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ruby 1.9.2 does not have the problem. It is not an option to migrate to
1.9.2 for the moment.
Is it a know issue? I am not able to find any reference to this problem
on the net

Thanks in advance for your inputs