ndipiazza wrote The mvel 2.1 beta's are actually older then most of the mvel 2.1 drools releases. Check nexus timestamps. The versions are indeed not maven/osgi conflict resolution compatible (they are not alfabatically comparable ordered), but as long as mvel doesn't release 2.1.0.Final there's little we can do. -- View this message in context: http://drools.46999.n3.nabble.com/Anyone-know-any-reason-not-to-replace-m... Sent from the Drools: User forum mailing list archive at Nabble.com.