I've recieved great results so far with cisTEM, but haven't been able to successfully run an automatic or manual refinement. When I try to start a refinement, the upper left panel that usually shows what exact job is running remains blank, and after a few seconds, the GUI crashes. In the terminal where I openned the GUI, I usually see 'Segmentation fault (core dumped)'. It doesn't look like I'm hitting the memory limit on the cluster I'm using (Torque). Any idea what could be causing this?