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A Tale of Two Configurations: TNS Names and Environment Variables

edited Feb 12, 2021 7:01AM in Database


Problem Solution Approach: This quick note will outline what problem, I was facing and how I resolved it for the benefit of others


Oracle TNS Names and Windows System Environment Variables - A Tale of two Configurations!

So here is the background:

I had just installed ODAC - Oracle Data Access Controls for Visual Studio.

Little did I notice, it created a new ORACLE Home upon completion.

So when I tried connecting to my Oracle instance in OCI, I kept getting the below error.

Problem: ORA-28759: failure to open file

I changed passwords multiple times, to no avail, that didn't work. So next, I decided to explore the Environment variables in the OS.


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