Can't call method "make_singlepart" on unblessed reference at /opt/rt3/lib/RT/Attachment_Overlay.pm

RT Developers
#1

Still fighting the attachment battle I am getting the above error
here is my code in Attachment_Overlay:

if ( $Attachment->parts ) {
$id = $self->SUPER::Create(
TransactionId => $args{‘TransactionId’},
Parent => 0,
ContentType => $Attachment->mime_type,
Headers => $Attachment->head->as_string,
Subject => $Subject);

foreach my $part ( $Attachment->parts ) {
    my $SubAttachment = new RT::Attachment( $self->CurrentUser );
        $SubAttachment->Create(
        TransactionId => $args{'TransactionId'},
    Parent        => $id,
    Attachment    => $part,
    ContentType   => $Attachment->mime_type,
    Headers       => $Attachment->head->as_string(),

        );

I added the if statement below to try and create a new html

attachment for #

every microsoft document that is being attached to this ticket

Find out if we are attaching a doc file and make an html copy of each doc

   if($Subject =~ /\.doc$/) { # we have a microsoft document attached
    my $html;
    my $fh;
    my $newHtml;
    my $tmpdir;
   
    # try new temporary filenames until we get one that didn't

already exist
do { $html = tmpnam() }until $fh = IO::File->new($html,
O_RDWR|O_CREAT|O_EXCL);

    # install atexit-style handler so that when we exit or die,
    # we automatically delete this temporary file
    END { unlink($html) or die "Couldn't unlink $html : $!" }

    # remember the path to the temporary file
    $tmpdir = dirname($html);

    # get the name of the html copy of our document
    ($newHtml = $Subject) =~ s/\.doc$/\.html/;
   
    # use wvHtml (check abiword.org out for details on the word

importer …)
system(“wvHtml --targetdir $tmpdir”, $Subject, $html) ;

    # build a new MIME Entity object to attach to the ticket
    my $ent = MIME::Entity->build(Type     => "text/html",
                          Path     => $html,
                          Filename => $newHtml);
         
    # Create a new attachment for the html copy
    my $htmlAttachment = new RT::Attachment( $self->CurrentUser );
    #$id = $self->SUPER::Create(
    #    TransactionId => $args{'TransactionId'},
    #    Parent        => 0,
    #    ContentType   => $ent->mime_type,
    #    Headers => $ent->head->as_string,
    #    Subject => $newHtml);
   
        $htmlAttachment->Create(
        TransactionId => $args{'TransactionId'},
        Parent        => $id,
        Attachment    => $ent->body,
        ContentType   => $Attachment->mime_type,
        Headers       => $Attachment->head->as_string(),
            );
    }

And I get the above error… is there anyhing particularly obviousl that
I am doing wrong here?
I am new to Perl and specifically OO perl (though I have been
programming C++, SmallTalk and Java for ~9 years now…)

Thanks
Ron.