Oracle Upgrade - Help

Hi,
We are planning to upgrade our Oracle RDBMS from 9(9.2.0.7) to 10R2. As a preparation I was performing some test on a staging server.
I simulated our current env by installing 9.2.0.7 and creating the DB. This is under an oracle9i unix user (oinstall, dba group) and oracle Home --> /opt/oracle/product/9.2/
Next I installed 10.2.0.1 using a new user oracle10 (oinstall and dba group) under the oracle home /opt/oracle/product/10.2/
While i login as oracle10 and perform an sqlplus "/ as sysdba" it keeps giving me the ORA-12560: TNS:protocol adapter error
Because of this I cannot run the upgrade SQL
The ORACLE SID and ORACLE HOME are correctly set
If i login as oracle9i user and perform the same I can login to the database and is fine.
While installing Oracle10 can i install it using the same unix owner of Oracle 9i or should I perform it as a different user.

If you are referring to the test environment. Make sure that at install time you have defined the administrative group to be consistent. On the other hand, when you have the same box with a mixture of oracle homes, you must be careful with the environment variables defined. If you also mix the environment variables you will have funny results. It looks like variables such as LD_LIBRARY_PATH and PATH are mixing the libraries from the 10g and 9i environments.
~ Madrid
http://hrivera99.blogspot.com

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