Print PDF file - Imagick cant find file but it exists in supplied folder

[mountainclimbing]

Hello,

Am trying the example "print_from_pdf.php"

$pdf = "resources\document.pdf";
$connector = new NetworkPrintConnector("IP Address", 9100);
$printer = new Printer($connector);
try {
$pages = ImagickEscposImage::loadPdf($pdf);
foreach ($pages as $page) {
$printer -> graphics($page);
}
$printer -> cut();
} catch (Exception $e) {
/*

• loadPdf() throws exceptions if files or not found, or you don't have the
• imagick extension to read PDF's
  */
  echo $e -> getMessage() . "\n";
  } finally {
  $printer -> close();
  }

I have succesfully installed the imagick extension but I keep receiving the error:

Uncaught exception 'Exception' with message 'exception 'ImagickException' with message 'UnableToOpenBlob `resources\document.pdf': No such file or directory @ error/blob.c/OpenBlob/2702'

Which relates to file not being available but I have the file in said directory/folder. What could I be missing?

Am I suppose to edit anything on "ImagickEscposImage.php" to supply the pdf file?