Example 6 in Getting Started with Arduino Confusing/Problematic

[Freakwhensee]

I'm new to programming, but I believe I implemented the sketches for Example 6: Arduino Networked Lamp in both Processing and Arduino correctly, but when I run the Processing sketch, I get an error that type Serial from "Serial port;" is ambiguous. No idea what that means or how to resolve it.

Additionally, when I came here to compare sketches, I see that in addition to the Processing.pde, there's another folder called sketch.properties which, if that has any bearing on my issue, I have no way of knowing; further, I have no idea if it's important and if so, what to do with it.

[mlowman]

This appears to be a problem with Processing 4. If you download and run the code with Processing 3.5.4, it should work. https://processing.org/releases