note Perlbotics <p> Short answer: You cannot with [cpan://Proc::Simple] (longer: in your case when starting a sub{...} as a child process) <p> This is what happens in the child part of the [doc://fork]() that is executed for your <c>$func = sub{...};</c> <code> # in Proc::Simple # $func = sub{ ... }; # your code ... if(ref($func) eq "CODE") { $self->dprt("Launching code"); $func->(@params); exit 0; # Start perl subroutine } else { ... </code> So, the <c>exit 0</c> (successful execution) is all that is returned from your sub{...}. The <c>$return</c> value is discarded. <p> Your sub{...} could return the result to the main process by means of [doc://perlipc|IPC] or by storing the result in a temporary file (e.g. [cpan://YAML], [cpan://JSON], [cpan://Storable], etc.). The parent process could read the result from a pipe or load the serialised data from a file after the sub has finished. <br><ins>Update:</ins> [cpan://IPC::Lite] <p> However, I guess, that in this particular case, you're better off with [doc://threads] and maybe a queue. 998484 998484