[rules-users] Check if a pattern binding exists in the RHS

Hello everybody, on the LHS of my rule i connect several Conditions with OR and have different variable bindings for this Condition. Now - if any of this conditions does not fire, i assume that the binding variable is not created, so I can't access it in the RHS. This results in an null pointer exception when I call the fireAllRules-Command in my Java Application. A simple rule example: rule "Rule 1" when HKT: Parameter(parameterCode = "HKT", value < normalFloor) or GGT: Parameter(parameterCode = "GGT", value < normalFloor) or HSR: Parameter(parameterCode = "HSR", value < normalFloor) and GOT: Parameter(parameterCode = "GOT", value > normalFloor) then System.out.println(HKT.toString(); end So my Question is: Is there any way to check in the RHS wheter the pattern binding has been created or not or do i have to change the way of writing my rules (which i do not want to)? thanks, hatzlj -- View this message in context: http://www.nabble.com/Check-if-a-pattern-binding-exists-in-the-RHS-tp1903... Sent from the drools - user mailing list archive at Nabble.com.