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<div class="moz-cite-prefix">Le 18/12/2018 à 03:01, Matthew Knepley
a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CAMYG4Gm_fjjPkt7knfZ-wCdKjAG8cP1hWxNEB0yrhB0AHZSLkw@mail.gmail.com">
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<div dir="ltr">On Mon, Dec 17, 2018 at 4:24 PM Yann Jobic via
petsc-users <<a href="mailto:petsc-users@mcs.anl.gov"
moz-do-not-send="true">petsc-users@mcs.anl.gov</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Dear petsc users,<br>
<br>
I'm using petsc FEM framework, with p4est. I'm getting a
strange error, <br>
when changing the number of point in DMPlexCreateBoxMesh()
(2D, 20x20 is <br>
ok, 22x22 is not) :<br>
<br>
[0]PETSC ERROR: Nonconforming object sizes<br>
[0]PETSC ERROR: The section point closure size 20 != dual
space dimension 18<br>
</blockquote>
<div><br>
</div>
<div>Okay, here is what the nomenclature means. The closure
size is the size I get from the Section</div>
<div>when I take the closure of the given point. So for
example, if we have quads and Q2 elements,</div>
<div>that would have a closure size of</div>
<div><br>
</div>
<div> 3 x 3 = 9</div>
<div><br>
</div>
<div>per component. So a 2-component Q2 element would have
closure size 18. The dual space</div>
<div>dimension is the number of dual space basis vectors. If
we use a Lagrange element, there</div>
<div>would be 1 dof per vertex, 1 per edge and 1 per cell for
quadratic fields, so on a quad that is</div>
<div>9 dofs, and for 2 component fields that is 18. This is
why the two numbers are designed to match.</div>
<div>Could you give</div>
<div><br>
</div>
<div> -petscds_view</div>
<div><br>
</div>
<div>so I can see the element you are using, and also
PetscSectionView() on the DM section (or use</div>
<div>-petscsection_view although that catches all sections, so
it hard to find the right one).</div>
<div><br>
</div>
<div> Thanks,</div>
</div>
</div>
</blockquote>
The problem arise in parallel, and for a 6x6 grid size. I'm doing
something wrong, but i don't know where. It's working fine in older
petsc version.<br>
You will find in attachment the log files.<br>
<br>
The code for the section is the following :<br>
ierr = DMGetSection(dmAux,§ion);CHKERRQ(ierr);<br>
PetscSectionView(section, PETSC_VIEWER_STDOUT_WORLD);<br>
<br>
Thanks for the help !<br>
<br>
Yann<br>
<br>
<blockquote type="cite"
cite="mid:CAMYG4Gm_fjjPkt7knfZ-wCdKjAG8cP1hWxNEB0yrhB0AHZSLkw@mail.gmail.com">
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<div><br>
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<div> Matt</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
[0]PETSC ERROR: See <a
href="http://www.mcs.anl.gov/petsc/documentation/faq.html"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://www.mcs.anl.gov/petsc/documentation/faq.html</a>
<br>
for trouble shooting.<br>
[0]PETSC ERROR: Petsc Release Version 3.10.2, Oct, 09, 2018<br>
[0]PETSC ERROR: ./gauss on a named crabe by yann Mon Dec 17
22:17:38 2018<br>
[0]PETSC ERROR: Configure options <br>
--prefix=/local/lib/petsc/3.10/p2/gcc/openmpi_gcc_all <br>
--with-single-library=0 --with-debugging=1
--download-scalapack=1 <br>
--download-metis=1 --download-parmetis=1
--download-ptscotch=1 <br>
--download-mumps=1 --download-hypre=1 --download-superlu=1 <br>
--download-superlu_dist=1 --download-fblaslapack=1
--download-metis=1 <br>
--download-ml=1 --download-p4est=1 --download-netcdf=1 <br>
--download-pragmatic=1 --with-cxx-dialect=C++11
--download-eigen=1 <br>
--download-parms=1 --download-triangle=1 --download-hdf5=1
--with-zlib=1 <br>
--download-szlib=1 --download-suitesparse=1
--with-shared-libraries=0 <br>
PETSC_ARCH=openmpi_gcc_all<br>
[0]PETSC ERROR: #1 DMProjectLocal_Generic_Plex() line 400 in
<br>
/local/yann/petsc-3.10.2/src/dm/impls/plex/plexproject.c<br>
[0]PETSC ERROR: #2 DMProjectFunctionLocal_Plex() line 530 in
<br>
/local/yann/petsc-3.10.2/src/dm/impls/plex/plexproject.c<br>
[0]PETSC ERROR: #3 DMProjectFunctionLocal() line 6320 in <br>
/local/yann/petsc-3.10.2/src/dm/interface/dm.c<br>
[0]PETSC ERROR: #4 DMProjectFunctionLocal_p4est() line 4393
in <br>
/local/yann/petsc-3.10.2/src/dm/impls/forest/p4est/pforest.c<br>
[0]PETSC ERROR: #5 DMProjectFunctionLocal() line 6320 in <br>
/local/yann/petsc-3.10.2/src/dm/interface/dm.c<br>
[0]PETSC ERROR: #6 SetupVelocity() line 332 in <br>
/local/yann/fe-utils/petsc/3.10/gauss.c<br>
[0]PETSC ERROR: #7 SetupVelBC() line 359 in <br>
/local/yann/fe-utils/petsc/3.10/gauss.c<br>
[0]PETSC ERROR: #8 main() line 652 in <br>
/local/yann/fe-utils/petsc/3.10/gauss.c<br>
<br>
I'm using petscspace_degree == 2 for the primary field, and
also for the <br>
auxiliary one (velocity). The error occurs when i project
the velocity <br>
function into the auxiliary field.<br>
<br>
Do you see where the problem could come from ?<br>
<br>
Best regards,<br>
<br>
Yann<br>
<br>
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