Hello, I am having troubles getting the 5.4.0.Final OSGi bundle to install/activate on Apache Karaf 2.2.7. Note - I have already fixed the JAXB/XJC problem as discussed here: https://issues.jboss.org/browse/JBRULES-3192 So following from this I have tried two different approaches: a) Drop the OSGi bundle jars into Karaf deploy/ folder b) Using Karaf Console The latter method is discussed here: http://drools.46999.n3.nabble.com/drools-osgi-issue-td4017799.html The console session for (b) was as follows: osgi:install -s wrap:mvn:com.google.protobuf/protobuf-java/2.4.1 osgi:install -s wrap:mvn:org.antlr/antlr-runtime/3.3 osgi:install -s wrap:mvn:javax.persistence/persistence-api/1.0.2 osgi:install -s mvn:org.mvel/mvel2/2.1.0.drools16 osgi:install -s wrap:mvn:com.thoughtworks.xstream/xstream/1.4.2 osgi:install -s wrap:mvn:org.drools/drools-spring/5.4.0.Final osgi:install -s mvn:org.drools/knowledge-api/5.4.0.Final osgi:install -s mvn:org.drools/knowledge-internal-api/5.4.0.Final osgi:install -s mvn:org.drools/drools-core/5.4.0.Final NullPointerException (no stack trace) Clearly the 5.4.0.Final bundle, as is, does not work in Apache Karaf 2.2.7. So my question is this: Has the fix in the post above been applied to a patch that I can download, please? Or must I wait for 5.5.0.Beta1? Otherwise, is there a previous version of Drools OSGi bundles that does work with Apache Karaf? Many thanks for any pointers. Cheerio, Nic