I finally got a debug file. Here are the last lines before the abend . . .

***** QH_Proc: response received from 192.54.112.30
QH_ns_resp: recd resp with id 923
Received Response->Domain Name: netlint.com, Type: mx AN=0 AU=4 AR=4
adding netlint.com, type = ns to non-authoritative cache
adding netlint.com, type = ns to non-authoritative cache
adding netlint.com, type = ns to non-authoritative cache
adding netlint.com, type = ns to non-authoritative cache
adding ns1.smartbuy.net, type = a to non-authoritative cache
adding ns2.smartbuy.net, type = a to non-authoritative cache
adding ns3.smartbuy.net, type = a to non-authoritative cache
adding ns4.smartbuy.net, type = a to non-authoritative cache
Received possible referral in response for netlint.com
QH_ns_resp: Sent query with id 1054 to 64.27.14.2
***** QH_Proc: response received from 192.54.112.30
QH_ns_resp: recd resp with id 926
Received Response->Domain Name: future-online.net, Type: mx AN=0 AU=2 AR=2
adding future-online.net, type = ns to non-authoritative cache
adding future-online.net, type = ns to non-authoritative cache
adding ns1.name.com, type = a to non-authoritative cache