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I am receiving the following error while trying to do anything:

ORACLE_HOME environment variable not set!
DBI connect('sid=myDBName;host=myHost;port=myPort','dbo',...) failed: 
(UNKNOWN OCI STATUS 1804) OCIInitialize. Check ORACLE_HOME and NLS settings 
etc. at /home/sympa/bin/List.pm line 1096

I have changed the sid, host and port but it was showing the correct 
information. I am able to connect to Oracle as sympa user. Please help.

Thanks