I want to install PL/SQL 6.05 in window 2003 system. Any pre requirement? I install this tool and does not working. Maro stated that need to install SQl*net. Does this componet is in Pl/SQL developer package?
Oracle Net is part of the Oracle Client. That is what you need to install on your Windows 2003 system. The Oracle Client can be found on the Oracle Server installation media.