PDFLIB error 2516

Hi All, I upgraded my test system to 4.3.9 (from 4.3.4) and now run into problems with pdf creation. Scripts that ran fine before now return the following error: Fatal error: PDFlib error: [2516] PDF_findfont: Metrics data for font 'Arial' not found in d:\website\pdf_graph.php on line 50 Has anybody seen this before and knows of the solution? Google returned no hits that solved the problem. <snip> pdf_open_file($pdf, "d:\\website\\graphs.pdf"); pdf_set_info($pdf, "Author", "Automatically Generated"); pdf_set_info($pdf, "Title", "Management graphs"); pdf_set_info($pdf, "Creator", "Jacob A. van Zanen"); pdf_set_info($pdf, "Subject", "Management Graphs"); pdf_begin_page($pdf, 700, 600); $bookmark1 = pdf_add_bookmark($pdf, "Information for machine SBPXXA1"); $arial = pdf_findfont($pdf, "Arial", "host", 1); pdf_setfont($pdf, $arial, 12); //-----this is line 50 pdf_show_xy($pdf, "1 Information for machine SBPXXA1 for $_POST[day]/ $_POST[month]/$_POST[year]",50, 510); </snip> TiA Jack van Zanen