I made mistakes in this script. On line 4 it should read

mkdir $cart or warn $!;
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(I should listen to my own advice)

Also it fails if there is no ACE with everyone as the account. So I rejigged it as follows.

use Win32::Perms;

###
#
# get_index_of($account_name, $ace)
#
# Return an array of positions of ACEs
# with trustee of $account_name or if called
# in scalar context the index of the first matching ACE
#
###

sub get_index_of {
    my ($account_name, $ace) = @_;
    my $index = -1;
    my @positions;
    do {
        $index++;
        print "$index";
        $perm = $$ace[$index];
        print $perm;
        if ($perm->{'Account'} eq $account_name) { push @positions, $i
+ndex };
    } while ($index < $#$ace);
    wantscalar and return $positions[0];
    return @positions;
}

$cart='TestingFolder';
mkdir $cart or warn $!;

# Create a new Security Descriptor and auto import permissions
# from the directory

my @perms;
my $perm;
my $Dir = new Win32::Perms( $cart ) or die;

$Dir->Get(\@perms) or die;    #Get permissions

$Dir->Dump;

my $acl_index = get_index_of('Everyone', \@perms);
print "Returned ", $acl_index;
print $perm->{'Account'};

if (defined $acl_index) {

    $Dir->Remove($acl_index) or die $!;
    $Dir->Set() or die$!;
}

$Dir->Dump;
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If you --me can you let me know so I can learn?