You start the Scheduler. You have to start the Scheduler to be able to execute scheduled DBM commands.
You have the server authorization SchedulerMgm.
scheduler_start
OK
Logging on to the Database Manager CLI as operator OLEG with password MONDAY, connecting to the database instance DEMODB, and starting the Scheduler for this database instance
>dbmcli -u OLEG,MONDAY -d DEMODB scheduler_start
OK