Originate-coa ip addresses

Sorry, I accidentally hit send before I was finished. I tried setting ipaddr = 192.168.0.0 netmask = 24 to originate-ca, but that still resulted in this error WARNING: Unkown destination 192.168.0.6:3799 for CoA request If I set ipaddr = 192.168.0.6, it works as expected. So is there a way to specify entire subnets in originate-coa?