Currently the simulation stalls when time field of primary data is outside of the range of simulation startDate and endDate.
We should throw an exception in these cases instead rather than leaving the user waiting and wondering / despairing.
The issue can be reproduced by running simona with vn_simona after setting vn_simona.conf to:
simona.time.startDateTime = "2012-01-01T00:00:00Z"
simona.time.endDateTime = "2012-01-01T02:00:00Z"