I have created a dataset containing the sum of two tags and put it into a trend. This causes me no problems untill I change the time range to more than 17 days. When I set the time range for more than 17 days the trace dissapears and the value shows no data. I have tried to trend them separately, and then it seems to work perfectly. Does anyone have a solution for this?
I can add that i have tried to trend the dataset by VBA and define the time range in the code, this does not help.
Thank you in Advance