Hello Everybody, I have a MASON simulation that works fine if I run it without GUI, but with GUI it starts off normally and then slows down over time until it hardly progresses at all. For displaying the simulation results I create several TimeSeriesChartingPropertyInspector() and at each simulation step I add a data point. Beyond 50000 data points the simulation becomes incredibly slow and I wonder if the problem has to do with the underlying JFreeChart !? So has anybody else noticed a dramatic slow down once many data points have to be displayed ? Many thanks, Axel