In NW 6.5.6, I'm getting the following error

Unable to convert errno to isc_result : 24 resource temprarily

I have 2 DNS servers - one running on NW 6 and the other on 6.5. I am
having no problem with NW 6 DNS server. Both servers are in the same
tree / linked via NDS

Eventually, the DNS server on NW 6.5 asks me to press any key to close
the screen (and hence unloads named)