Spipu (./2) :
try to generate the PDF page by page, by using writeHTML foreach page

Thanks for your answer. But generating per page doesn't make any difference.

Another problem is when i have to generate i very large pdf (more than 40 pages) my server gives an error.

Perhaps is generating the pdf foreach page therefore a good solution, Now i have to find a solution to merge the pdfpages to 1 document.