Oracle TNS names configuration I've edited added new TNS name to tnsnames.ora.
Toad for Oracle started to work at once. SQL Plus doesn't work even after logoff/logon, the same problem with my build scripts.

Getting the error: ORA-12154: TNS:could not resolve the connect identifier specified

How could I fix it?
There are various methods  of achieving this ,one of them as suggested by Yasir.
Please follow the below steps:


Close toad/sqlplus
Create a folder TNS_ADMIN
Add tnsnames.ora in TNS_ADMIN
Add TNS_ADMIN in enviornment variable.
Open Toad/Sqlplus and login 


I think this will be very clear ,cheer