[rules-users] Error while adding rule package in 5.0.0M2 & 5.0.0M3

Hi, When I pointed the rules from Drools 4.0.7 to Drools 5.0.0M2, I'm getting the following errors at runtime. I also tried Drools 5.0.0M3 (same error). The error occurs while adding a package. Could someone help me? Do I've to do something differently for 5.0.0M2?   java.lang.NullPointerException  at org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:420)  at org.drools.reteoo.ReteooRuleBase.addPackage(ReteooRuleBase.java:381)   Thanks, Jagathesh