<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi guys,<div><br></div><div>I am running a simulation in FLASH 3.0 using multiple species, and after about 5000 time steps, I run into the following error:</div><div><br></div><div><div>[amr_prolong_gen_unk1_fun] PE= 7, ivar= 13, value= 24.0 </div><div>Trying to convert non-zero mass-specific variable to per-volume form in monotonic mesh interpolation, but dens is zero!</div><div><br></div><div>The ivar = 13 being referred to here is the first species in my species list defined in Flash.h, which at the time of the abort is equal to smallx everywhere. It appears from the code that the recv variable array must have a zero value for density in at least one grid cell, but as far as I'm aware the density variable should never drop below smallrho!</div><div><br></div><div>Tracking the origin of this issue could take a very long time, so I was hoping someone here has encountered this issue before and knows of a remedy? Is there anywhere in FLASH where the density is set explicitly to zero?</div><div><br></div><div>Thanks!</div><div apple-content-edited="true"> <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> </div><br></div></body></html>