[rules-users] Temporal constraints

Hello, I am trying to make a rule to delay firing until a certain amount of time has passed without another event being received. I have set up a loop that goes every 10 seconds in my main application that takes readings and injects them into the ReadingStream. These are like sensor readings. I have a thread started at initialization that is basically calling fireUntilHalt() and I never call halt until shutdown, and that seams to be working fine. So basically any time an out of spec reading in my Reading object (<15) is received, I want to wait to see if a FollowUpReading is not received in the next 5 seconds, before I fire the results(The second rule below). The first rule is there just to verify I am indeed detecting NumReadings with values < 15 being injected and that works fine. Now at this point in my appication I am *never* inserting a FollowUpReading object/event, so I would expect the 2nd rule to fire all the time, however the strange thing is that it only fires the first time I receive a reading out of spec. I see rule one fire, then the seond time, but after that any subsequent out of spec readings received(I know they are out of spec, because rule 1 still fires when received) but rule 2 never fires again. It only ever fires one time! This is very confusing. These ar the only 2 rules and the only two object types being inserted to the stream. Know that rule 2 *can* fire because it does once and only once. Why won't it fire beyond the first time, even though I never insert the FollowUpReading() ? Thanks, Chris declare NumReading @role( event ) end declare FollowUpReading @role(event) end rule "Determine out of spec reading" when $n : NumReading($r:reading < 15) from entry-point "ReadingStream"; then System.err.println("Fire off a follow up reading for device: " + $n); end rule "Missed degrading confirmation reading" when $n : NumReading($r:reading < 15) from entry-point "ReadingStream"; not (FollowUpReading(this after[0s, 5s] $n)) then System.err.println("No good reading received for: " + $n); end