ORA-12203 after installing 7.3

I've installed Oracle 7.3. I've also created a user named "sa". Then I configured "Oracle net easy configuration", but when I want to login with this user, I recieve "ORA-12203:TNS-Cannot connect to destination". I would be so thankful if you guide me in how I can solve this problem.

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I'd first install Oracle 10g or at least Oracle 9i since Oracle 7.3 was released pre-1990 and has been desupported for about a decade now. I barely remember working on 7.3 databases, and if you're running any recent OS, 7.3 is probably not supported anyway, so there's a whole host of likely OS compatibility problems.

Check your tnsnames.ora file for the connect descriptor and also check to make sure that the listener is running on the server.


This was first published in August 2004

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