[rules-users] Error deploying drools-spring (5.4.0.Final) on ServiceMix 4.4.1

Hello, I have deployed drools-spring on ServiceMix 4.4.1 and suffer the following error: java.lang.NullPointerException at org.apache.felix.framework.resolver.ResolverImpl.toStringBlame(ResolverImpl.java:1521)[org.apache.felix.framework-3.0.9-fuse-07-03.jar:] at org.apache.felix.framework.resolver.ResolverImpl.checkPackageSpaceConsistency(ResolverImpl.java:943)[org.apache.felix.framework-3.0.9-fuse-07-03.jar:] at org.apache.felix.framework.resolver.ResolverImpl.resolve(ResolverImpl.java:130)[org.apache.felix.framework-3.0.9-fuse-07-03.jar:] at org.apache.felix.framework.Felix$StatefulResolver.resolve(Felix.java:4129)[org.apache.felix.framework-3.0.9-fuse-07-03.jar:] at org.apache.felix.framework.Felix.resolveBundle(Felix.java:3459)[org.apache.felix.framework-3.0.9-fuse-07-03.jar:] at org.apache.felix.framework.Felix.startBundle(Felix.java:1739)[org.apache.felix.framework-3.0.9-fuse-07-03.jar:] Nothing further in the log, so I am a bit stumped as to what the actual problem is. Has anyone successfully deployed drools 5.4.0.Final to ServiceMix 4.4.x, please? Cheerio, Nic Nicholas Hemley Direct: +44 (0) 117 231 0003 Scott Logic | 10 Victoria Street, Bristol, BS1 6BN Reception: +44 (0) 117 231 0000