Fatal error: Uncaught exception 'Exception' with message 'FPDF error: No page has been added yet' in /home/pdfpack/web/nxgvision.com/public_html/fpdf.php:271 Stack trace: #0 /home/pdfpack/web/nxgvision.com/public_html/fpdf.php(1450): FPDF->Error('No page has bee...') #1 /home/pdfpack/web/nxgvision.com/public_html/fpdf.php(643): FPDF->_out('0.00 841.89 566...') #2 /home/pdfpack/web/nxgvision.com/public_html/exercises-to-practice-irregular-verbs-32z13.pdf(74): FPDF->Cell(0, 6, 'Chapter 1 : Irr...', 0, 1, 'L', true) #3 /home/pdfpack/web/nxgvision.com/public_html/exercises-to-practice-irregular-verbs-32z13.pdf(101): PDF->ChapterTitle(1, 'Irregular Verbs...') #4 /home/pdfpack/web/nxgvision.com/public_html/exercises-to-practice-irregular-verbs-32z13.pdf(220): PDF->PrintChapter(1, 'Irregular Verbs...', 'Regular and irr...', '.') #5 {main} thrown in /home/pdfpack/web/nxgvision.com/public_html/fpdf.php on line 271