For Windows OS, I don't see a downside to: 

$cmd = "start perlprog.pl > file.log";
system ($cmd);

[download]

This "system" command should return just after the process is started. One downside is that you will get another cmd window pop up.

In reply to Re^2: spawning Perl scripts by mark4
in thread spawning Perl scripts by awkmonk

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