Try another way of expressing the range. Off the top of my head, something like

#!/usr/bin/env perl
use warnings;
use strict;
use Net::IP;
my $ip = new Net::IP ('192.168.0/23') || die ;
  # Loop
  do {
      print $ip->ip(), "\n";
  } while (++$ip);
[download]

where the prefix is bumped up in this case to /23.

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