Sqlplus can't connect to database from within a Virtual PC

Yes I know it's not supported but this question is for those people who want to help or have actually got it working :-)
I have an XP machine with a 10gR2 database.
I have a virtual machine on that XP machine which has the 10gR2 client installed on it.
While the configuration doesn't necessarily make sense (normally you'd put the database in the VM ) it's done for testing reasons.
All firewalls are off. The database is up and connections to is are fine from other machines.
The virtual PC can ping the host and tnsping the listener without a problem but any attempt to connect using sqlplus gives an error
ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified
C:\Documents and Settings\Administrator>tnsping myc10a
TNS Ping Utility for 32-bit Windows: Version 10.2.0.1.0 - Production on 06-AUG-2
008 10:10:02
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Used parameter files:
C:\oracle\product\10.2.0\client_1\network\admin\sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = pwrwks10
20)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME
= MYC10)))
OK (20 msec)
C:\Documents and Settings\Administrator>sqlplus cms/cms@myc10a
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Aug 6 10:10:06 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified
It's quite obviously an issue with the virtual PC. Has anyone tried this and have they figured out how to get it to work?
Regards,
David

ERROR:
ORA-12154: TNS:could not resolve the connect
identifier specified
C:\Documents and Settings\Administrator>sqlplus
cms/cms@myc10a
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Aug
6 10:10:06 2008
Copyright (c) 1982, 2005, Oracle. All rights
reserved.
ERROR:
ORA-12154: TNS:could not resolve the connect
identifier specifiedORA-12154 means "I looked in the TNSNAMES.ORA file I am trying to use (out of the potentially several on the machine) but I could not find an entry with "myc10a =", or "myc10a.{default_domain in the sqlnet.ora} ="
All tnsnames.ora entries look like
alias = description( ... )
and it can not find your alias. You might have several tnsnames.ora files. Or your file is not correct. Or you also have a sqlnet.ora file that contains a default domain entry, which would be appended to any alias passed in without a '.domain'
Suggest you post the tnsnames.ora and the sqlnet.ora
(And yes, I have that configuration working.)
Message was edited by:
Hans Forbrich

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