Barometer sensor- no graph

[gwaelod]

Version: 3.8590
Linux Ubuntu Headless 14:04
Kernel and CPU Linux 3.13.0-63-generic on x86_64
AMD Athlon(tm) 64 Processor 3200+


I have a Barometer that is displaying pressure from a BMP280/ESPeasy. Values look good and its uploading to Met Office WOW via the LUA script - however the log is completely blank!! I don't get any values plotted in the graph when i click the "Log" option on the sensor in Domoticz!

How can I get it to display the graph? All my other temperature/humidity sensors have log/graphs with no issues.

Baffled!