Oracle Database Discussions

I am having a problem with establishing a client connection from a new installation on a machine running Vista. This is my first experiment with Vista.

I can connect to an older 8i server using an 8i client installation on the Vista machine but I can't connect to any servers using either the 10g or 11 client. tnsping always returns "TNS-12541: TNS:no listener". XP machines on the network have no problems using the same client installation.

Windows firewall is always turned off. I run Norton but it is turned off. I can telnet to the listener port (1521) on all servers.

In a trace it always fails with "nsopen: unable to open transport". Any ideas?
A trace is included below. Thanks.

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nlstdipi: entry
nlstdipi: exit
nnfun2awanm: entry
nnfgiinit: entry
nncpcin_maybe_init: first request sent to name server will have ID 0
nncpcin_maybe_init: initial retry timeout for all name servers is 1500 csecs
nncpcin_maybe_init: max request retries per name server is 1
nngsini_init_streams: initializing stream subsystem, cache size is 10
nngtini_init_msg: initializing PDU subsystem, initial pool size is 2
nncpcin_maybe_init: default name server domain is [root]
nnfgiinit: Installing read path
nnfgsrsp: entry
nnfgsrsp: Obtaining path parameter from names.directory_path or native_names.directory_path
nnfgsrdp: entry
nnfgsrdp: Setting path:
nnfgsrdp: checking element TNSNAMES
nnfgsrdp: checking element EZCONNECT
nnfgsrdp: Path set
nnfun2a: entry
nlolgobj: entry
nnfgrne: entry
nnfgrne: Going though read path adapters
nnfgrne: Switching to TNSNAMES adapter
nnftboot: entry
nlpaxini: entry
nlpaxini: exit
nnftmlf_make_local_addrfile: entry
nnftmlf_make_local_addrfile: construction of local names file failed
nnftmlf_make_local_addrfile: exit
nlpaxini: entry
nlpaxini: exit
nnftmlf_make_system_addrfile: entry
nnftmlf_make_system_addrfile: system names file is C:\oracle\product\11.1.0\client_1\network\admin\tnsnames.ora
nnftmlf_make_system_addrfile: exit
nnftboot: exit
nnftrne: entry
nnftrne: Original name: indigo
nnfttran: entry
nnfttran: exit
nnftrne: Using tnsnames.ora address (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.12)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = xe))) for name indigo
nnftrne: exit
nnfgrne: exit
nlolgserv: entry
nnfggav: entry
nnftgav: entry
nnftgav: exit
nnfgfrm: entry
nnftfrm: entry
nnftfrm: exit
nnfgfrm: exit
nlolgserv: exit
nlolgobj: exit
nlolfmem: entry
nlolfmem: exit
nnfun2awanm: Getting the path of sqlnet.ora
nnfun2awanm: Getting the adapter name
nnfun2awanm: exit
nsmal: 212 bytes at 0x2826b28
nscall: connecting...
nladini: entry
nladini: exit
nladget: entry
nladget: exit
nsc2addr: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.10.10.12)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=xe)))
nttbnd2addr: entry
snlinGetAddrInfo: entry
snlinGetAddrInfo: exit
nttbnd2addr: using host IP address: 10.10.10.12
snlinFreeAddrInfo: entry
snlinFreeAddrInfo: exit
nttbnd2addr: exit
nsmal: 996 bytes at 0x28701b8
nsmal: 2096 bytes at 0x28705a8
nsmal: 84 bytes at 0x281a3a8
nsopen: opening transport...
nttcon: entry
nttcon: toc = 1
nttcnp: entry
nttcnp: exit
nttcni: entry
nttcni: Tcp conn timeout = 0 (ms)
nttcni: trying to connect to socket 368.
ntt2err: entry
ntt2err: soc 368 error - operation=1, ntresnt[0]=511, ntresnt[1]=61, ntresnt[2]=0
ntt2err: exit
nttcni: exit
nttcon: exit
nserror: nsres: id=0, op=65, ns=12541, ns2=12560; nt[0]=511, nt[1]=61, nt[2]=0; ora[0]=0, ora[1]=0, ora[2]=0
nsopen: unable to open transport
nsvntx_dei: entry
nsvntx_dei: exit
nsmfr: 2096 bytes at 0x28705a8
nsmfr: 996 bytes at 0x28701b8
nscall: connecting...
nladget: entry
nladget: exit
nsmfr: 212 bytes at 0x2826b28
nladtrm: entry
nladtrm: exit
nlse_term_audit: entry
nlse_term_audit: exit
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