| ERROR | database busy. Open, close, mount, and dismount not allowed now |
| CAUSE | Some operation is in progress that expects the opened/mounted state of this instance to remain the same. |
| ACTION | Wait for the operation to complete then retry. If attempting to do a shutdown, SHUTDOWN ABORT will work. If this is a shutdown of a standby database that is operating in NO DATA LOSS mode, you must shutdown the primary database first. |