Thanks for your super-quick reply Udo.
I did try all of those options - especially the repeat until terminated.

I think though your suggestion has helped.

It appears that the Job Completion Options apply to each job, not the list of defined jobs. So the first job had no end time because I created it with the Job Completion option set to repeat until terminated. If I set that first (and subsequent jobs) to Sequence Completion, then it works.

So as you say, it appears I can define jobs here but I cannot run the whole sequence multiple times. If true then that would be an issue for this demo.