The problem is still there and appears to only occur when collecting data from the Ventus when WD is opened up. Live data is picked up correctly.
An example is today:
Ventus rain total today (from around 05:00) 2.2mm. WD opened and imported data showed around 38mm for today. WD was then closed. Opened WD 10 minutes ago, after a further 0.7mm rain.
Ventus daily total 2.9mm. WD daily total now 74.2mm
Weather Capture Advance shows the rain totals correctly.
The only think that I haven’t checked is the USB connection between the Ventus and the PC.
Because of the distance between the Ventus and PC, I’ve had to use a long USB cable run.
The total cable length is about 11 - 12m and includes 2 x 5m in-line amplified USB cables.
This arrangement has always worked fine, (with the Ventus and other USB equipment) but I will try connecting the Ventus to the PC with a short USB cable and do a download just to confirm if the problem still occurs when using WD.
I now have a Vantage Pro2 which I am trying out with WD on a separate PC, however the Ventus may find a home elsewhere with a separate copy of WD if I can get it sorted out.