I've created a multi-task job in 11g EM to do a cold backup.
The last task is to open the database after running RMAN script
to backup the database. It failed with the error ORA-01081: cannot start already-running ORACLE - shut it down first
Also does the shutdown/startup database task work on cluster databases?
Are you using a sql script job? The job should not be causing the said error.
It is important to note that a job does not load the host environment variable. So if you are depending on any, this may be the cause of the error.