On the Survey Results screen there is a "PDF Version" link that generates A PDF version of the survey results.
If you are unable to generate a PDF and receive either of the following error messages:
"Sorry there was an error" message
or
"-100 WebSupergoo ABCpdf8 Internal PDFException HTML render is blank"
then the PDF engine may have stopped responding.
This can be fixed by going to "Admin.Tasks" and clicking on the "Recycle Vx Back-end" button which will restart the application pool. You may need to contact Vuture Support if you do not have access to this function.