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<div class="" style="word-wrap:break-word; line-break:after-white-space">I don’t use standard Einstein Toolkit thorns. &nbsp;I also don’t use refinement levels in Carpet. &nbsp;Please see attached for an example. &nbsp;The error occurs when I change the ghost zone size to
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<div class="">-DG</div>
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--&nbsp;<br class="">
David Garrison, Ph.D.&nbsp;<br class="">
Associate Dean for&nbsp;the College of Science and Engineering,&nbsp;<br class="">
Professor and Founding Chair of&nbsp;Physics<br class="">
University of Houston-Clear Lake&nbsp;<br class="">
Bayou 3611/STEM 2252<br class="">
Houston, TX 77058&nbsp;<br class="">
<br class="">
BAYOU: 281-283-3717<br class="">
STEM : 281-283-3796&nbsp;<br class="">
<a href="https://www.uhcl.edu/science-engineering/faculty/garrison-david" class="">https://www.uhcl.edu/science-engineering/faculty/garrison-david</a>&nbsp;<br class="">
<a href="http://www.uhcl.edu/physics" class="">http://www.uhcl.edu/physics</a><br class="">
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&quot;If we knew what it was we were&nbsp;doing, it would not be called&nbsp;research, would it?&quot; — Albert&nbsp;Einstein.&nbsp;<br class="">
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<div class="">On Apr 21, 2022, at 9:24 AM, Bruno Giacomazzo &lt;<a href="mailto:bruno.giacomazzo@unimib.it" class="">bruno.giacomazzo@unimib.it</a>&gt; wrote:</div>
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<div dir="ltr" class="">DG,<br class="">
<div class="">&nbsp; if you could share the parameter file that would be useful in order to try reproducing the error with standard&nbsp;Einstein Toolkit thorns. I do not see any problem with the lines of code you posted&nbsp;in the email.</div>
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<div class="">Do you get the same problem also when using Carpet without refinement levels?</div>
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<div class="">Best regards,</div>
<div class="">Bruno</div>
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<div dir="ltr" class="x_gmail_attr">Il giorno gio 31 mar 2022 alle ore 19:17 Garrison, David &lt;<a href="mailto:Garrison@uhcl.edu" target="_blank" class="">Garrison@uhcl.edu</a>&gt; ha scritto:<br class="">
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<div class="">Hello,
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<div class="">It is a custom code so I am attaching the part I used to do the reductions instead.</div>
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<div class="">handle = CCTK_ReductionHandle(&quot;average&quot;);</div>
<div class="">ierr = CCTK_Reduce(cctkGH, -1, handle, 1, CCTK_VARIABLE_REAL, &amp;scale_factor, 1, CCTK_VarIndex(&quot;MHD_Analysis::aa_out_avg&quot;));</div>
<div class="">ierr = CCTK_Reduce(cctkGH, -1, handle, 1, CCTK_VARIABLE_REAL, &amp;utime, 1, CCTK_VarIndex(&quot;MHD_Analysis::univ_age&quot;));</div>
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<div class="">-DG</div>
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<div class="">On Mar 31, 2022, at 9:21 AM, Bruno Giacomazzo &lt;<a href="mailto:bruno.giacomazzo@unimib.it" target="_blank" class="">bruno.giacomazzo@unimib.it</a>&gt; wrote:</div>
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<div dir="ltr" class="">DG,
<div class="">&nbsp; &nbsp; could you share the parameter file you are using? So that we may have a better look at the problem.</div>
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<div class="">Thanks,</div>
<div class="">Bruno</div>
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<div dir="ltr" class="x_gmail_attr">Il giorno mer 30 mar 2022 alle ore 20:52 Garrison, David &lt;<a href="mailto:Garrison@uhcl.edu" target="_blank" class="">Garrison@uhcl.edu</a>&gt; ha scritto:<br class="">
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<div class="">Hello,
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<div class="">Whenever I set the number of ghost zones to 1, I get segmentation faults from my reduction operations.&nbsp; This wasn’t an issue with Pugh or when I use 2 or more ghost zones with Carpet.&nbsp; Has anyone else had this problem?</div>
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<div class="">-DG</div>
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<div class="" style="text-align:start; text-indent:0px">--&nbsp;<br class="">
David Garrison, Ph.D.&nbsp;<br class="">
Interim Associate Dean for&nbsp;the College of Science and Engineering,&nbsp;<br class="">
Professor and Founding Chair of&nbsp;Physics<br class="">
University of Houston-Clear Lake&nbsp;<br class="">
Bayou 3611/STEM 2252<br class="">
Houston, TX 77058&nbsp;<br class="">
<br class="">
BAYOU: 281-283-3717<br class="">
STEM : 281-283-3796&nbsp;<br class="">
<a href="https://www.uhcl.edu/science-engineering/faculty/garrison-david" target="_blank" class="">https://www.uhcl.edu/science-engineering/faculty/garrison-david</a>&nbsp;<br class="">
<a href="http://www.uhcl.edu/physics" target="_blank" class="">http://www.uhcl.edu/physics</a><br class="">
<br class="">
&quot;If we knew what it was we were&nbsp;doing, it would not be called&nbsp;research, would it?&quot; — Albert&nbsp;Einstein.&nbsp;<br class="">
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<p class=""><font class="">Pr<font face="arial, sans-serif" class="">of. Bruno Giacomazzo<br class="">
Department of Physics<br class="">
University of Milano-Bicocca<br class="">
</font></font><span class=""><font face="arial, sans-serif" class="">Piazza della Scienza 3<br class="">
</font></span><span class=""><font face="arial, sans-serif" class="">20126 Milano<br class="">
</font></span><span class="" style="font-size:12.8px">Italy</span></p>
<p class=""><font class=""><span class="" style="font-size:12.8px">email:&nbsp;</span><span class="" style="font-size:12.8px"><a href="mailto:bruno.giacomazzo@unimib.it" target="_blank" class="">bruno.giacomazzo@unimib.it</a><br class="">
</span><span class="" style="font-size:12.8px">phone: (+39) 02 6448 2321</span></font><br class="">
<font class=""><span class="" style="font-size:12.8px">web:&nbsp;</span></font><span class="" style="font-size:12.8px"><a href="https://urldefense.com/v3/__http://www.brunogiacomazzo.org/__;!!BCR0FSePrR4x!GUGB7CSrDExPdA7mPVZuCzM9_713wMhA6f8kQaO9C64EN4b4r13kCh02xdXjodRmQMcnuEwDpO-G513ivCR5jfvd-LgExw$" target="_blank" class="" style="font-size:12.8px">http://www.brunogiacomazzo.org</a></span></p>
<p class=""><font class="">----------------------------------------------------------------------<br class="">
<span class="" style="font-size:12.8px">There are only 10 types of people in the world:<br class="">
</span><span class="" style="font-size:12.8px">Those who understand binary, and those who don't<br class="">
</span><span class="" style="font-size:12.8px">----------------------------------------------------------------------<br class="">
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--&nbsp;<br class="">
David Garrison, Ph.D.<br class="">
Interim Associate Dean for&nbsp;the College of Science and Engineering, Professor and Former Chair of Physics<br class="">
University of Houston-Clear Lake<br class="">
Bayou 3611<br class="">
Houston, TX 77058&nbsp;<br class="">
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Tel: 281-283-3796&nbsp;<br class="">
Fax: 281-283-3709&nbsp;<br class="">
<a href="http://sce.uhcl.edu/garrison" target="_blank" class="">http://sce.uhcl.edu/garrison</a><br class="">
<a href="http://www.uhcl.edu/physics" target="_blank" class="">http://www.uhcl.edu/physics</a><br class="">
<br class="">
&quot;If we knew what it was we were&nbsp;doing, it would not be called research,<br class="">
would it?&quot; ‹ Albert Einstein.<br class="">
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<p class=""><font class="">Pr<font face="arial, sans-serif" class="">of. Bruno Giacomazzo<br class="">
Department of Physics<br class="">
University of Milano-Bicocca<br class="">
</font></font><span class="" style=""><font face="arial, sans-serif" class="">Piazza della Scienza 3<br class="">
</font></span><span class="" style=""><font face="arial, sans-serif" class="">20126 Milano<br class="">
</font></span><span class="" style="font-size:12.8px">Italy</span></p>
<p class=""><font class=""><span class="" style="font-size:12.8px">email:&nbsp;</span><span class="" style="font-size:12.8px"><a href="mailto:bruno.giacomazzo@unimib.it" target="_blank" class="">bruno.giacomazzo@unimib.it</a><br class="">
</span><span class="" style="font-size:12.8px">phone: (+39) 02 6448 2321</span></font><br class="">
<font class=""><span class="" style="font-size:12.8px">web:&nbsp;</span></font><span class="" style="font-size:12.8px"><a href="https://urldefense.com/v3/__http://www.brunogiacomazzo.org/__;!!BCR0FSePrR4x!DqdugUWohGBKF9_Wl__sHgXYw1vCqt6Rw0l_AuKu5GS6Xh14wzBgWopnoJL3cax3rxn42oIsJW6QCOoYgGoKOrxkYCB7dw$" target="_blank" class="" style="font-size:12.8px">http://www.brunogiacomazzo.org</a></span></p>
<p class=""><font class="">----------------------------------------------------------------------<br class="">
<span class="" style="font-size:12.8px">There are only 10 types of people in the world:<br class="">
</span><span class="" style="font-size:12.8px">Those who understand binary, and those who don't<br class="">
</span><span class="" style="font-size:12.8px">----------------------------------------------------------------------<br class="">
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