Had you checked the job log and a detailed spool file for the reasons.
I see that you screen is looking quite different to the screen in my system.
I have a section to select which kind of detail I want in the log, right below the process control section.
What release are you on?
And the spool is the usual place where you can see the reason why something was not archived. And if nothing was archived, then no archive file is written.
Have you defined the residence days in customizing (big button in SARA) ?
