[Zope-dev] What to raise to generate an HTTP error response?

I have a Bobo/ZPublisher method that detects a missing file it needs. I want to return a 404 HTTP response. I know my method is supposed to raise something, but what? I know it must be in the docs somewhere, but I'll be damned if I've been able to find it. (I hope there's a Zope site search tool in the works. How about setting up Ultraseek or something similar in the meantime?) Thx, Skip Montanaro | Mojam: "Uniting the World of Music" http://www.mojam.com/ skip@mojam.com | Musi-Cal: http://www.musi-cal.com/ 518-372-5583