Warning: Division by zero in pdf.php on line 342

#0 pdf.php(342): __error(2, 'Division by zer...', '/home/www/feuer...', 342, Array)
#1 pdf.php(981): pdf_generator->run()
#2 {main}

Warning: Invalid argument supplied for foreach() in pdf.php on line 510

#0 pdf.php(510): __error(2, 'Invalid argumen...', '/home/www/feuer...', 510, Array)
#1 pdf.php(981): pdf_generator->run()
#2 {main}

FPDF error: Some data has already been output, can't send PDF file