Hey Orkun, Although the example I attached doesn't use the plot3D mesh invoke node it does successfully plot two signals on one graph. I would suggest using this example as reference for modifying your program to plot more than one signal. The same techniques that allow more than one plot in this example will apply to your program. As I pointed out before there are two main things you'll need to modify. You'll need to create multiple plots and then make sure you're referencing different plots when using the invoke node to call Plot3DMesh.
I hope this helps! Sarah Miracle National Instruments
