The lying help docs
On input changed
Runs after an input connection to a node of this type is changed.
Houdini calls this script with the full path and class/type arguments described above, plus a third argument containing the index of the input connection that changed.
If this is my Input Changed Event Script
message “( $arg1 , $arg2 , $arg3 )”
The arg3 isn't getting set.
Stupid message box
( /obj/stupidNode , Object/stupidNode , )