Allin, There seems to exist a bug in the new release of gretl (1.6.1). Open any sample file and do a frequency plot changing the number of bins (one of the new features). Then try to edit the histogram color to another value within the triangle. Finally, close the histogram and File>Quit gretl. Say no to choosing the session stuff. Well, on my WinXP SP2 machine, more often than not, gretl exits to window but gives me a bomb error dialog (some instruction referenced ...). This happens MOST OF THE TIME; I have not found what causes it. Incidentally, it would be nice if a user could change BOTH the fill color and bin border color of a histogram via the GUI. Way things work now, I cannot draw bins that have white fill and black border (I guess I can if I use plot commands but going via the GUI would be nice especially since the fill color command is already there). John Paravantis University of Piraeus Greece