Random crashes


i have been trying to record a time lapse over the last few days but keep encountering random crashes. The time lapse is supposed to cover three days of activity 8 hours a day but I am lucky if I get two hours before the app hangs with the spinning beachball and the camera stops firing. I have tried twice now on two separate Macbooks one of which is very new. Any suggestions? We used the previous version of iStopMotion prior to updating to Mavericks and it worked fine but now it is just too unreliable. Are the any updates, fixes or suggestions about how to avoid these crashes.