[O] Agenda to iCal not working

[Ken Mankoff]

I'm using the examples from 
https://www.gnu.org/software/emacs/manual/html_node/org/Exporting-Agenda-Views.html

Specifically,

(setq org-agenda-custom-commands
      '(("X" agenda "" nil ("agenda.html" "agenda.ps"))
        ("Y" alltodo "" nil ("todo.html" "todo.txt" "todo.ps"))
        ("h" "Agenda and Home-related tasks"
         ((agenda "")
          (tags-todo "home")
          (tags "garden"))
         nil
         ("~/views/home.html"))
        ("o" "Agenda and Office-related tasks"
         ((agenda)
          (tags-todo "work")
          (tags "office"))
         nil
         ("~/views/office.ps" "~/calendars/office.ics"))))

But the HTML, PS, and ICS files are not being created. If I'm visiting an Org 
file and run (org-icalendar-export-to-ics) then the ICS is generated.

Can someone offer advice why the ICS isn't generated when I generate a specific 
agenda view?

Thanks,

  -k.