Graph 3D Version 2.2 Beta Question

[Harold A Climer]

I think I have followed the instructions in the first post in this thread about Han's program in The Prime Software Library and can not find any syntax errors when I check the code,but I get a green plot screen when I try to plot Sin(X+Y). {I think the green colored screen relates to the fact I am using V3 as the spot to put the equation.} Also when I look at the NUM screen I get the X and Y values but the V3 column screen shows the word FALSE instead of a numerical value.
I get no plot of anything. I also tried one of Han's examples and get similar results
I have tried both Han's original code as well as the modified code by Cyrille.Are there any General Calculator settings that I might have missed in order for this program to work. When I run the program from the program list, I get the exclamation point inside an orange circle.
What is the correct format for typing in an equation that is going to be displayed?