Following a server hang I get the following errer when attempting to load

Starting eDirectory integrated Novell DNS Server...
critical: eDirectory login failed with error -603
critical: Failed to load RRs of a zone with error -603
critical: loading configuration: (result code text not available)
critical: exiting (due to fatal error)
DNS Server is unloaded successfully
DNS Server Exiting

I performed and DSRepair and it identified 53 repairs (success).

I am a newbee and not sure where to look next. This is a Netware 6.5 SP2
(sheesh!) server, it is a member of a replica chain.
eDirectory v8.7.3.2.
NSPDNS.NLM v6.20.03.
NLDAP.NLM v10552.88

Any suggestion appreciated.