On 30/12/2010 17:55, Gregory Mace wrote: Not really, it's still a "work in progress". Drools trunk has further OSGi classloader improvements as we learn new things. The only real guide is the SpringDM based unit test that is there, but looks like you are following that too. Nearly every case we've had where people have had problems was because they didn't have the right dependnecies. OSGi is very strict and when not setup properly it's almost impossible debug, not for the faint hearted. Mark