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ldap_simple_bind_s core dump

Hi Folks,
I'm developing a driver for an LDAP server(OpenLdap 1.2.10). The driver functions are being called
from a multithreaded process with only 1 thread running. My LDAP functionality has no
multi threading support as I have wrapped the functions with mutex locks. When I unit
test the functions all is fine but when a process is kicked off from the Web front
end it causes a core dump with a SIGCHILD. I am using the Netscape SDK(4.0)by the way.
Below is a trace of the functionality being called before the crash courtesy of GDB.
Any help will be greatly appreciated.
--------->>>>> CRASH
#0  0xeefa0580 in memcpy () from /usr/platform/SUNW,Ultra-250/lib/libc_psr.so.1
#1  0x15d78 in realloc ()
#2  0xef76f370 in thr_keycreate () from /usr/lib/libthread.so.1
#3  0xee33baf4 in __rpc_getconfip () from /usr/lib/libnsl.so.1
#4  0xee32f1e0 in gethostbyname_r () from /usr/lib/libnsl.so.1
#5  0xed69fb58 in nsldapi_connect_to_host () from /install/conexon/lib/libldapssl40.so
#6  0xed69f7c4 in nsldapi_open_ldap_connection () from /install/conexon/lib/libldapssl40.so
#7  0xed6a3bbc in nsldapi_new_connection () from /install/conexon/lib/libldapssl40.so
#8  0xed69f8a4 in nsldapi_open_ldap_defconn () from /install/conexon/lib/libldapssl40.so
#9  0xed6a3050 in nsldapi_send_server_request () from /install/conexon/lib/libldapssl40.so
#10 0xed6a2cec in nsldapi_send_initial_request () from /install/conexon/lib/libldapssl40.so
#11 0xed6a90ac in simple_bind_nolock () from /install/conexon/lib/libldapssl40.so
#12 0xed6a90f8 in ldap_simple_bind_s () from /install/conexon/lib/libldapssl40.so
/* MY CODE. */
#13 0xed7e4778 in BindToLdap (Details=0xedd045e0, FunctionName=0xed7e7840 "CreateLDAPModem()") at LdapApi.c:537
#14 0xed7e4ac0 in CreateLDAPObj (Details=0xedd045e0) at LdapApi.c:707
#15 0xed7e492c in CreateCM (Details=0xedd045e0) at LdapApi.c:645
#16 0xed7e42d8 in PerformAction (Details=0xedd045e0) at LdapApi.c:419
#17 0xed7e41c0 in LdapBusinessInterface (Details=0xedd045e0) at LdapApi.c:350
#18 0xef71960c in AddModemRequest (psReq=0xedd01e98, psAPI=0xef7524b8, psDB=0x9e62c) at cable_modem.c:520
#19 0xef718a9c in ProcessModemRequest (psReq=0xedd01e98,
    pcDets=0xedd0996a "1\0346565\034ddddddddd\034\034\034\034Cable\034", lLen=26, psAPI=0xef7524b8, psDB=0x9e62c)
    at cable_modem.c:258
#20 0xef70c8f4 in ProcessRequest (
    psCmd=0xedd09950 "15\0341\0341054283726\03410.0.1.30\0341\0346565\034ddddddddd\034\034\034\034Cable\034",
    lCmdLen=52, ppcResp=0xedd09510, plRespLen=0xedd09304, psDB=0x9e62c) at business.c:577
#21 0x13190 in WRB (Params=0x43ea4) at WRB.c:172