In a rule 1, I call a function and I insert a new Object in the workingMemory. An another rule (rule 2) match when the new object is in the workingMemory. In JBoss4, It's ok In JBoss5, rule 2 not match even though the new object is in the workinMemory. Example: -------- function boolean simpleFunction(){ .................... } rule "rule 1" when ------ then Test t = new Test() t.field = simpleFunction() insert(t) end rule "rule 2" when Test() then ......... end I don't understand difference Between 2 environments. An Idea? Thanks Jerome -- View this message in context: http://drools.46999.n3.nabble.com/Difference-of-behavior-between-JBoss4-a... Sent from the Drools: User forum mailing list archive at Nabble.com.