[rules-users] Shadow fact problem?

Hi, I am running 3.1-M1 and have (by way of example) two simple rules; A and B as follows:- rule "A" when $a1 : Attribute ( name == Constants.ATTRIBUTES_A, $pa : number ) $a2 : Attribute ( name == Constants.ATTRIBUTES_B, $nc : number ) $p : Process ( attributesList contains $a1, attributesList contains $a2 ) then double txy = doSomeMaths($pa, $nc, $p); Attribute a = new Attribute(Constants.ATTRIBUTES_C, txy); $p.addAttribute(a); assertLogical(a); modify($p); System.out.println("Rule 'A' fired"); end rule "B" when $a1 : Attribute ( name == Constants.ATTRIBUTES_C, $txy : number) $p : Process( attributesList contains $a1 ) // <-- Line causing rule not to activate then double m = doSomeMoreMaths($txy, $p); System.out.println("Rule 'B' fired"); end Process exposes an ArrayList of Attribute objects (each having a name\value pair). When the content of the ArrayList held by Process is added to (Rule 'A') the next rule (Rule 'B') is not being activated. Can anybody provide any insight into how best a workaround can be engineered? With kind regards, Mike