Oh, I misunderstood, I thought these were Advanced PDF templates., and also new ones. If these are existing merge templates that all worked, and now all of them are not working, it seems more likely that NetSuite changed something which broke them. I would contact NS support and let them know all your templates are broken, and the time when you first noticed it. NS historically has released i-fixes on Thursday nights, so it’s possible a fix released just before the 11th is the cause of this.