java. lang. IncompatibleClassChange Error ??

What the hell is this error.. !
Can anyone tell me why is this happening... ?
The same program which was working earlier.. is not working now... n giving me this error.
Can anyone tell me the cause ??
I have gone thr the documentation it says...
"Thrown when an incompatible class change has occurred to some class definition. The definition of some class, on which the currently executing method depends, has since changed. "
I am not getting anything out of it... can anyone help me out...
Its urgent...
Ur help will be highly appreciated
Thanks
Badal
www.necoinfotech.com

Errors of this type usually indicate you have recompiled some of your classes, while other classes that are used by those classes have not been recompiled, yet their bytecode is no longer compatible with the newly compiled classes.
Make sure you fully recompile *all* the classes in your project and see if you can get passed the error.