Oracle® Database 11g / 12c / 18c error codes ORA-32845: Messaging Gateway agent is already running

ORA-32845: Messaging Gateway agent is already running

Oracle Error Code: ORA-32845

Cause: An attempt was made to start the Messaging Gateway agent when an agent instance is already running.

Action: Shut down the Messaging Gateway agent currently running, verify the agent process has been terminated, and start the Messaging Gateway agent.