HI Sir/ Madam,

I just upgraded pl/sql developr to 8.0.

In on server, there are 3 oracle application server with each TNSnames.ora under separate directory at D driver.
I installed pl/sql developer in C driver.

I could log into different remote (include a local orcl test DB at D driver) database from these tool include sqlplus. But I could not log into any ( include a local orcl test DB at D driver) database from pl/sql developer. Plz see attached pict. I also do not find a place of pl/sql developer TNS configuration.

Where do I need to configure pl/sql TNS file?
my OS is 32 bit window 2003 Sp2. database version is 32 bit or 64 bit 10.2.0.4
Please advised me.

Thanks
Jim
If you start PL/SQL Developer without connecting, go to Tools > Preferences > Oracle / Connection, you can select the Oracle Home with the correct TNSNAMES.ORA file.
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