OLE exception from "Microsoft PowerPoint 2010":

PowerPoint could not open the file.

Win32::OLE(0.1709) error 0x80004005: "Unspecified error"
    in METHOD/PROPERTYGET "Open" at openppt.pl line 17

##</code><code>##

use strict;
use warnings;
use Win32::OLE;
use Win32::OLE::Const qw( Microsoft.PowerPoint );
use Win32::OLE::Enum;

$Win32::OLE::Warn = 3;

my $app = get_powerpoint();
$app->{Visible} = 1;

my $presentation = $app->Presentations->Open('strMgrErr.pptx');


sub get_powerpoint {
    my $app;
    eval { $app = Win32::OLE->GetActiveObject('PowerPoint.Application') };
    die "$@\n" if $@;

    unless(defined $app) {
        $app = Win32::OLE->new('PowerPoint.Application',
            sub { $_[0]->Quit }
        ) or die sprintf(
            "Cannot start PowerPoint: '%s'\n", Win32::OLE->LastError
        );
    }
    return $app;
}