[jfreechart-dev] Error on mac os x

[<se...@it...>]

Hi,

I try to use JFreeChart. When I use it in my eclipse project it's  
fine but when I run it on command line by adding JFreeChart and  
JCommon in my class path I have an error when I create a PiePlot:

PiePlot plot = new PiePlot(dataset);

Here is the error :

apple.awt.EventQueueExceptionHandler Caught Throwable :  
java.lang.ExceptionInInitializerError
java.lang.ExceptionInInitializerError


Any ideas?
Thanks
Seb