hi toni Jboss tools contains the plugin for 5.5 and 5.4. But the question is will that plugin be compatible with the guvnor 4.2.1 ? -- View this message in context: http://drools.46999.n3.nabble.com/Guvnor-compatibility-with-EXPERT-tp4023720p4023724.html Sent from the Drools: User forum mailing list archive at Nabble.com.