Accumulate function doesn't work at all in 5.3.0 Final

1. I'm setting the stream mode to work with events (kbaseConfig.setOption( EventProcessingOption.STREAM ) 2. I have a simple DRL file declare StateEvent @role( event ) end rule "Test" when Number($total : doubleValue) from accumulate( StateEvent(itemName=="Temperatura", $val : newState) over window:length( 5 ) from entry-point "EventStream", average ( ((DecimalType)$val).toBigDecimal().doubleValue() ) ) then System.out.println("" + $total); end 3. I insert a fact into working memory (entry point "EventStream") WorkingMemoryEntryPoint entry = ksession.getWorkingMemoryEntryPoint("EventStream"); entry.insert((RuleEvent) new StateEvent(item, state)); 4. Fire rules 5. Repeat steps 3 and 4 to put accumulate and average functions to work RESULTS WITH 5.2.0 Final Works nicely, i can see the average updated with every fact inserted. RESULTS WITH 5.3.0 Final It returns the same result and average (neither sum or the simplest case count(1)) doesn't work.