Servers are NW6-SP5. I am trying to set up DHCP for one of our WAN
locations. I receive the following error messages:

iManager: "The Create DHCP Server request failed. Failed adding
Reference fields."

DNSDHCP Management Console: "Attempted to add an attribute illegal for
that object class."

I have run DNIPINST -R, then DNIPINST to recreate the schema extensions.
These proceed without errors. I also tried creating the server locally
instead of at the WAN location. So far I just hit a brick wall.