<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi all,<div><br></div><div>I'm trying to restart a FLASH simulation on Franklin. If I run on 2000 cpus, the job runs fine, however if I try to push the code to 4000 cpus, I get the following error:</div><div><br></div><div>abort_message [flash_convert_cc_hook] Trying to convert non-zero mass-specific variable to per-volume form, but dens is zero!</div><div><br></div><div>I've been guessing that it has something to do with memory allocation, so I've tried reducing MAXBLOCKS substantially (but still above the maximum number of blocks on a given processor), but this doesn't solve the problem. I've also played a bit with the MPICH parameters, but they also seem to have limited effect. Anyone have an idea of what I can try to do to solve this problem?</div><div><br></div><div>Thanks!<br><div apple-content-edited="true"> <span class="Apple-style-span" style="font-size: 12px; "><div><br class="Apple-interchange-newline">-- <br>James Guillochon<br>Department of Astronomy & Astrophysics<br>University of California, Santa Cruz<font class="Apple-style-span" color="#144FAE"><span class="Apple-style-span" style="text-decoration: underline; "><br></span></font></div><div><a href="mailto:jfg@ucolick.org">jfg@ucolick.org</a></div></span> </div><br></div></body></html>