ORA-12571, Oracle 8.1.7.4, Win 2000 Server

From: EP <ep_at_plusnet.pl>
Date: Fri, 23 May 2003 00:18:47 +0200
Message-ID: <bajiat$sf7$1@nemesis.news.tpi.pl>

Hi

I am experiencing frequent ORA-12571 errors - there can be even ten of them produced in 1 minute. Network seems to be OK, ping and tnsping work, routers and switches are also OK.
Do you have any idea what could be the cause ? I enclose the fragment of server trace file:

Best Regards,
EP

nsdofls: entry
nsdofls: DATA flags: 0x0
nsdofls: sending NSPTDA packet
nspsend: entry
nspsend: plen=66, type=6

nttwr: entry
ntt2err: entry
ntt2err: soc 12124 error - operation=6, ntresnt[0]=530, ntresnt[1]=54, ntresnt[2]=0
ntt2err: exit
nttwr: exit

nspsend: transport write error
nspsend: error exit
nserror: entry
nserror: nsres: id=1, op=67, ns=12571, ns2=12560; nt[0]=530, nt[1]=54,

nt[2]=0; ora[0]=0, ora[1]=0, ora[2]=0
nsdofls: error exit
nsdo: nsctxrnk=0
nsdo: error exit
nioqrc: send failed: bl = 1, nicbl = 1

nioqper:  error from nioqrc
nioqper:    nr err code: 0
nioqper:    ns main err code: 12571
nioqper:    ns (2)  err code: 12560
nioqper:    nt main err code: 530
nioqper:    nt (2)  err code: 54
nioqper:    nt OS   err code: 0

nioqer: entry
nioqer: incoming err = 12150
niomapnserror: entry

niqme: entry
niqme: reporting NS-12571 error as ORA-12571
niqme: exit

niomapnserror: returning error 12571
niomapnserror: exit Received on Thu May 22 2003 - 17:18:47 CDT