Ora-12203 TNS Unable to Connect - Urgent

Ora-12203 TNS Unable to Connect - Urgent

 

  

Hi DBA's,

One of my client has Oracle client 8.0.5 installed. When I execute
PLUS80.EXE, and enter the login,password and connect string I could logon to
sqlplus successfully. After loging on, if I use CONNECT to connect to other
user in the same instance I am getting ORA-12203 TNS unable to connect to
destination.

I have TNSNAMES.ORA under 2 folders
i.e. C:\ORANT\NETWORK
as well as in C:\ORANT\NET80.
Also we have a common share folder having TNSNAMES.ORA which is referred in
registry (TNS_ADMIN).Which TNSNAMES.ORA file among these will be used by
SQLPLUS.

How to resolve this issue. In what way SQLPLUS refer the TNSNAMES.ORA file.
What is the order of reference.

Thanks,
With Regards,
Thirumudi Dhodduraj .
Database Administrator - APD(GBS)
COMPAQ COMPUTER ASIA/PACIFIC PTE LTD
SINGAPORE.
Phone (65) 580 5245
Pager 580 5224
Fax (65) 580 5227
Dhodduraj.[Email Address Removed]Oracle LazyDBA home page