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It solved beautifully with MUMPS. Thank you Matt!<br>
<br>
Alex<br>
<br>
<div class="moz-cite-prefix">On 09/16/2015 10:58 AM, Matthew Knepley
wrote:<br>
</div>
<blockquote
cite="mid:CAMYG4Gkj7Ki5frtL+ZNGMeESY7kunw3-n+KJQWwLAKwrmutGHw@mail.gmail.com"
type="cite">
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<div class="gmail_extra">
<div class="gmail_quote">On Wed, Sep 16, 2015 at 8:28 AM,
Alexander Lindsay <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:adlinds3@ncsu.edu"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:adlinds3@ncsu.edu">adlinds3@ncsu.edu</a></a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<br>
<br>
I've built a MOOSE application and the problem I'm
studying solves great using serial LU. However, when I try
to solve in parallel using super LU, I encounter many
DIVERGED_LINE_SEARCH errors using the default bt line
search. If I switch to line_search=none, then instead of
DIVERGED_LINE_SEARCH errors I get DIVERGED_FNORM_NAN
errors. I do not have a lot of debugging experience, but I
am slowly gaining more. Is there a good way to get more
information about what's causing the NAN's? I.e. a
specific residual or jacobian statement?<br>
<br>
This may not even be an appropriate list to post this
problem in (could be more on the MOOSE side); apologies if
that's the case.<br>
</blockquote>
<div><br>
</div>
<div>The NaN means something has gone wrong. However, there
are a few SuperLU_dist bugs that we know of. You could
try:</div>
<div><br>
</div>
<div> - Upgrading PETSc to the latest patch, which should
download the fixed SuperLU_dist</div>
<div><br>
</div>
<div> - Trying MUMPS instead</div>
<div><br>
</div>
<div> Thanks,</div>
<div><br>
</div>
<div> Matt</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
Alex<br>
</blockquote>
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-- <br>
<div class="gmail_signature">What most experimenters take for
granted before they begin their experiments is infinitely
more interesting than any results to which their experiments
lead.<br>
-- Norbert Wiener</div>
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