TNS protocol Adapter Error

[kamran riaz]

oracle 9i is install in my pc (its instal by my brother )
but i enter user name system password manager
then its reply some error ORA-12560
how can i solve this problem bcoz i want to export some data
plz reply me quickly
thanks

[Jeanne Boyarsky]

Kamran,
Welcome to JavaRanch! You are probably going to get a more useful answer by just asking your brother, but here's my attempt:

Check you are entering the SID: sqlplus username/password@sid. The SID is like the database name.