I was able to run your code++ and replicate your results on Active State Windows, 5.20.
I did find this link: Many-Core Engine for Perl providing parallel processing capabilities. MCE is new to me. IPC::Shareable is not available on Active State Windows.

In reply to Re^2: IPC:Shareable: Not an array reference by Marshall
in thread IPC:Shareable: Not an array reference by Bloehdian

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