How to recreate 24 hour graph (20180219.gif). No data in graph.

Thought my problem had been solved by updating to the latest S67 version.
As you can see above there is no data at all in the graph 20180304.gif
my curr24hourgraph.gif, 48hourgraph.gif and 72hourgraph.gif are fine.

Did I mis a setting here or there, why is the datestamped graph not created.

Once this problem is solved, I’d like to know how to create earlier datestamped graphs.
Don’t want to make thinks complicated. :oops:

TIA