Plot S-Parameter in Smith Chart from ocn-Script

 Hello,

I want to plot the s11-parameter of my design from an ocn script in the smithchart, but it doesn't work. I use Cadence DFII 6.1.5 and I used the functions  awdPlotSignals(), awdPlotSimpleBLOCKED EXPRESSION, awdSetOptionValue(), awdSetDisplayMode() and so on, but it does not work at all. I have no idea what I am doing wrong. There are a few examples in the wavescan userguide, but they look curiously. Here is a part of my ocn script. The problem is, that the plot is always a rectangle plot.

id_window_1 = awvCreatePlotWindow()
awvSetOptionValue("mode" "smith")
id_window_1_sub_window_1 = awvAddSubwindow(awvGetCurrentWindow())
plot(aaSP(1 1)) 

Can somebody help me ? Thanks for response.