Fatal error: Uncaught ArithmeticError: Bit shift by negative number in D:\xampp-7\htdocs\gestmaj\tcpdf\include\barcodes\pdf417.php:747 Stack trace: #0 D:\xampp-7\htdocs\gestmaj\tcpdf\include\barcodes\pdf417.php(589): PDF417->getErrorCorrectionLevel(-1, 9) #1 D:\xampp-7\htdocs\gestmaj\tcpdf\tcpdf_barcodes_2d.php(289): PDF417->__construct('www.tcpdf.org', -1, 2, Array) #2 D:\xampp-7\htdocs\gestmaj\tcpdf\tcpdf_barcodes_2d.php(69): TCPDF2DBarcode->setBarcode('www.tcpdf.org', 'PDF417') #3 D:\xampp-7\htdocs\gestmaj\tcpdf\tcpdf.php(15514): TCPDF2DBarcode->__construct('www.tcpdf.org', 'PDF417') #4 D:\xampp-7\htdocs\gestmaj\tcpdf\examples\example_050.php(168): TCPDF->write2DBarcode('www.tcpdf.org', 'PDF417', 80, 90, 0, 30, Array, 'N') #5 {main} thrown in D:\xampp-7\htdocs\gestmaj\tcpdf\include\barcodes\pdf417.php on line 747