Cumulus Support

I shut down Cumulus at about 20.00 each night, and turn off the computer, restarting again the next morning at about 06.15. After the data has reloaded in the morning, the graphs all have a large deviation typically as shown below, which matches the interval during which the computer has been turned off. I have reinstalled Cumulus after completely removing it from the computer, thinking that over the few years it has been running, the problem had developed, but I still have the same error. Any thoughts or comments would be greatly appreciated - thank you.

I saw exactly the same behaviour with my FO, try adding a fixed pressure offset in the cumulus.ini file and see if that cures it. It fixed mine for a while, then it made a huge jump, to big to correct on the console but cumulus still corrected it. The FO stations seem to lose their offset memory every so often