Hi Dennis,
The problem has revealed itself to a certain extent. I think that basically it is the formatting of the graph. The time on the x axis only shows the last second of data so when I stop it, it shows a straight line from the last second before I stopped it. Is there a way to format the x axis so that it shows an arbitrary time point of time=0 and a definable length of time to run to rather than the current time and date?
