Yvonne, The cause of the error is at

##### For archiving if enabled #####
log_archive_start = true
log_archive_dest = /data1/oradata/angus/arch

Then, start the instance issue,



SQL>alter system archive log start;

SQL> select * from v$instance;

Here you should see the archiving had been set to yes. Then shutdown the instance and restart the instance and issue

archive log list and see that you get a list. and also do the above select query and confirm that it is in archive mode.


Good luck,
Sam