B4a no longer works !

B4a no longer works! Here is the error message.

Compiling code. 0.09
Generating R file. 0.00
Compiling generated Java code. Error
java.lang.NoClassDefFoundError: com/sun/tools/javac/Main
Caused by: java.lang.ClassNotFoundException: com.sun.tools.javac.Main
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Exception in thread "main" Could not find the main class: com.sun.tools.javac.Main. Program will exit.

I checked Menu - Tools - Configure path and everything is OK
(see picture)
It 'possible that Eclipse (which it recently used) has changed something?
I hope to soon have help from some of you because I'm stuck!