<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head><body>Dear Amy,<br> <br> I see a couple of possibilities for your problem: <br> 1) that the number of particles in flight becomes too large for your memory; this may be due to the processes which create the optical photon, your initial energy, or a new strategy for deciding the order in which tracks are selected for tracking;<br> 2) That the output you are trying to create is too big.<br> What type of output ate you creating?<br> 3) there is a bug somewhere, and it creates a memory leak.<br> <br> Can you provide information about what version of GATE you use and the the version of Geant4.<br> <br> Also can you give more information about the crash you get, how many tracks/effects have been processed, and the amount of memory your machine has.<br> <br> Best regards,<br> John<br><br><div class="gmail_quote">On September 14, 2014 2:55:20 PM CEST, Amy Meldrum <ameldru@g.clemson.edu> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div dir="ltr">Gate users,<div><br /></div><div>I have been running simulations using optical photons that run to completion when I am using a beta source. However, when I change the source to an alpha source, suddenly all of my simulations only run for a few minutes before being killed. It seems like the memory usage skyrockets beyond some limit and get killed. </div><div><br /></div><div>Why would changing only the source do this? Is there something I can do to stop this from happening? The simulation runs fine for a few particles, but I am not sure why it would behave like this.</div><div><br /></div><div><br /></div><div>Please help. Thank you,</div><div><br /></div><div>Amy</div></div> <p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />Gate-users mailing list<br />Gate-users@lists.opengatecollaboration.org<br /><a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users">http://lists.opengatecollaboration.org/mailman/listinfo/gate-users</a></pre></blockquote></div><br> -- <br> Sent from my Android device with K-9 Mail. Please excuse my brevity.</body></html>