Dear Daniele,
Switching to openjdk-8 was the solution
Which java version were you using before?
I tried with java-11-openjdk, java-17-openjdk, and java-22-openjdk. Both fail. The log message I get starting from a terminal is the following :

WARNING: package com.apple.eawt not in java.desktop ...

It seems that the plugin is not very adapted for homes with intermediate floors (unfortunately, that is my case…).

As an example, if you draw a room at elevation 0, then do another level at elevation 100 with another room (not at the same location), the drawing does not respond very nicely.

I ...

And finally, a last question, I am quite new to SH3D, so I may not think properly ;-)

I would want to draw wirings from the first floor to second floor for instance (and also across rooms). I did a new separate level called "wirings" to put all my wires, and I gave it a height corresponding to both ...

I am now happy that I can make the plugin work. A strange behaviour is that when I press ESC after having drawing several points, nothing happens… So I need to manually click on the button "Draw wiring" to untoggle it, then it finishes creating the wire.

I do not have any idea of why…

For ...

Dear Daniele, thanks a lot for your plugin.

I was initially struggling a lot to get it working, I could only use the automatic wiring function (and the pan was not working).

And finally, reading all this thread meticulously, I found someone with the same trouble as me. Switching to openjdk-8 was ...