Use of uninitialized value $_ in pattern match (m//) at fluff.pl line 26, <IN> line 9.
Argument "1 1 1" isn't numeric in numeric ne (!=) at fluff.pl line 26, <IN> line 9.
Use of uninitialized value $_ in pattern match (m//) at fluff.pl line 26, <IN> line 9.
Argument "2 2 2" isn't numeric in numeric ne (!=) at fluff.pl line 26, <IN> line 9.
Use of uninitialized value $_ in pattern match (m//) at fluff.pl line 26, <IN> line 9.
Argument "3 3 3" isn't numeric in numeric ne (!=) at fluff.pl line 26, <IN> line 9.
Use of uninitialized value $_ in pattern match (m//) at fluff.pl line 26, <IN> line 9.
Argument "" isn't numeric in numeric ne (!=) at fluff.pl line 26, <IN> line 9.
Use of uninitialized value $_ in pattern match (m//) at fluff.pl line 26, <IN> line 9.
Argument "4 4 4" isn't numeric in numeric ne (!=) at fluff.pl line 26, <IN> line 9.
Use of uninitialized value $_ in pattern match (m//) at fluff.pl line 26, <IN> line 9.
Argument "5 5 5" isn't numeric in numeric ne (!=) at fluff.pl line 26, <IN> line 9.
Use of uninitialized value $_ in pattern match (m//) at fluff.pl line 26, <IN> line 9.
Argument "6 6 6" isn't numeric in numeric ne (!=) at fluff.pl line 26, <IN> line 9.

##</code><code>##

  elsif ($line =~ /\S/) {
      push (@arr, "$line\n");
      next;
  }

##</code><code>##

#!/usr/bin/perl
use strict;
use warnings;

my $infile = 'roegen6.vect';
my $count = 1;
my $outfile = "$infile-section_$count.vect";
my @arr;

sub create_file {
    open(OUT,">$outfile") or die "Error with outfile: $!\n"; 
    print OUT @arr;
    close(OUT);
    @arr=();
    $count++;
    $outfile="$infile-section_$count.vect";
}

open(IN,$infile) or die "Error with infile $infile: $!\n";
my @data=<IN>;
close(IN);

 foreach my $line (@data) {
  chomp($line);

  if ($line =~ /VECT/) {
      push (@arr, "$line\n");
      next;
  }
  elsif ($line =~ /\S/) {
      push (@arr, "$line\n");
      next;
  }
  else {
    push (@arr, "$line\n");
    create_file();
  }
 }
create_file if @arr;