ORA-12514: TNS:listener could not Find

I have already created Listener, DataBase, User.
I also have checked the tnslistner.ora , names.ora & other files.
They are correct.

tnsping is also working.

I don't find what is problem . plz help me.

Exact Error Is:

ORA-12514: TNS:listener could not resolve SERVICE_NAME given in connect descriptor


Savan Davande

youa re trying to connect to a service which the listener doesnt know about.

So yuo tnsnames / listener files are not correct are they?

post them