[rules-users] java.lang.NullPointerException at org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:291)

[Vincent LEGENDRE]

> You could probably also consider simplifying the rule structure... many - if
> not all - the evals and explicit getters seem unneeded.. that would make the
> rule more efficient and definitely more readable.

... and will potentially protect against null usage in operations, like the operation just before the condition you cite :
     ((lcki.getWS_RiskScore() - lcki.getWS_RiskScore())/lcki.getWS_RiskScore()) >= 4)
.. even if it reduce to false every time, using null there will raise a NPE ...

Did you check that your all the used fields are not null ?