[Xymon] Logged events

I've done something and now xymon always reports no events logged on the "all none green" page , even though tests are failing and recovering as recently as a few minute ago.

This might have started on the day I ran my first trimhistory command, but can't be sure about that.

I can still see the history of events in /var/lib/xymon/histlogs

Any suggestions on how I might troubleshoot this issue?