no addrs found for root NS

[Tan Chun Han/ITNOC/PBB/PBBG]

Dear all,

Want to find out what causes the below error messages,
we have disabled the nslookup to external root serves
by remarking the root server IP addresses in the conf file.

"svdns001 named[5682]: sysquery: no addrs found for root NS ()"

and....anyway to disable the query to root servers?

any comments/suggestions are appreciated.

Thanks
Tan Chun Han