Version 11 seems to allow for a slightly different incorporation of JFree Charts, and in turn a different set up for the GUI subclass of whatever model you are creating. Does anyone have some clean, well functioning code of a GUIclass that creates charts. It would be great if the charts plotted multiple items in different colors. mike Michael Makowsky Graduate Student Department of Economics George Mason University 703.608.1366 [log in to unmask] website: http://mason.gmu.edu/~mmakowsk ******************************