When NFA exports a large report as PDF it generates an invalid PDF that Adobe Acrobat Reader cannot show.
In Adobe Acrobat Reader the PDF appear as a big blank page.
I opened a case to verify this and the support told me to use another PDF reader.
But doing some research i found the PDF specification (www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/pdf_reference_1-7.pdf)
In the Appendix C (Implementation Limits) page 993 is stated that the maximun allowed page size is 200x200 inches (5080 x 5080 mm)
In my case NFA is generating a PDF that has a size of 216 x 5766 mm.
It would be good that CA fix this so we can use the standard Adobe Acrobat Reader to open the files.