hi, I try to add a ruleflow to my rule base : builder.addRuleFlow(RULE_FLOW); Package pkg = builder.getPackage(); ruleBase.addPackage(builder.getPackage()); But !!: java.lang.NullPointerException at org.drools.compiler.PackageBuilder.addRuleFlowsToPackage(PackageBuilder.java:469) at org.drools.compiler.PackageBuilder.getPackage(PackageBuilder.java:449) at mcmipih.rules.demo.service.TestDraft.main(TestDraft.java:31) -- View this message in context: http://www.nabble.com/add-process-only--%3E-bug---tf4334017.html#a12343434 Sent from the drools - user mailing list archive at Nabble.com.