When the compile button is pressed the compiler just opens the class for editing but does not compile it.
The classes are in a subpackage 'mixview.kanal'. In this package one class can be compiled. I don't know if it is by chance but the other two classes in this package can not be compiled.
The first Klass 'Kanaleigenschaften' extends a JFrame and implements ActionListener and WindowListener. The other class extends JPopupMenu and implements ChangeListener and MouseListener but I don't think that this causes the problem that the compiler does nothing.
The sourcecode is rather simple and not spectacular.
In addition the compiler does not work on different systems with the same bluej version.