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  1. or download this
    Error ORA-12545: Connect failed because target host or object does not
    + exist (DBD ERROR: OCIServerAttach) connecting to DBI:Oracle:host=<ho
    +stname>;sid=<sid>;port=1521
    
  2. or download this
    
    # DBI Initializations
    ...
    my $dbh = DBI->connect($dsn,$user,$password) or croak "Error $DBI::err
    +str connecting to $dsn\n";