Hi Ken, thanks for taking the time to reply. I'm actually not using package global variables. I should have included a few more lines: 
package IPC_Class
use strict;
use warnings;

sub new
{
  shift; my $self = { 'cmds' => undef, @_ };
  defined $self->{'cmds'} or die "ERROR: didn't get CMD in constructor
+.";
  IPC::Shareable->clean_up_all;
  bless $self; return $self;
}

sub start {
  my $self = shift;
  my $fh_glob_ref = shift;
  ...
  # the cmd "grep 'zzz'" in the next line will fail.
  my $h = IPC::Run::start(['sort'], '<pipe', $fh_glob_ref, '|', ['grep
+', 'zzz'], '>', $writefh, "2>", $writefh) or die "Error: $!\n";
  $self->{'h'} = h;
}

sub finish {
  my $self = shift;
  $h = $self->{'h'};
  if (!$h->finish()) {
    for ($h->full_results) { print "$_\n" };
  }
}

[download]
I'm really lost as to why it's not working :( The code in my start() method works beautifully. And if I move the code in my finish() method to the main program (having start() return $h), where I extract the data out of $h, then it works fine. But having the code in finish() and calling $o->finish() SOMEHOW loses the data in $h.

(Thanks for the note on IOS. Lesson learned.)

In reply to Re^2: IPC::Run harness question by italdesign
in thread IPC::Run harness question by italdesign

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