about line 5 So the open statement opens an existing PDF file.

# Open an existing PDF file
$pdf = PDF::API2->open('some.pdf');
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and to create a new pdf in the directory of your choice..

$pdf = PDF::API2->new(-file => 'our/new.pdf');
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Please note PDF::API2 and PDF::Create are two different modules on CPAN. more info on the metacpan site