Does anyone know why this example doesn't work? (%i1) x : [1,2,3,4]$ (%i2) plot2d([discrete,x,x],[style,[points,4,1,6],[lines,1,2]]) It produces only points (of the correct style), but no lines. If I remove the "[points ...]", the lines appear. I see this behavior with both 5.16.3 and 5.17.1. Kostas