Found that I also had problem printing to PDF....when I tried I was asked if I wanted to install PDF printer and said yes but got error and report was not created. Exited TMG and ran as Administrator, reinstall PDF printer, that worked. Tried to print from screen and that now works.
Restarted TMG normally and print from screen still works....but now Print to PDF not working again....am getting message
"Printer not activated, error code -20" followed by "Unable to start Print Job" followed by "Error exporting to ....."