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    <div class="moz-cite-prefix">Hi Matt,<br>
      <br>
      Thanks for your help. I will fix this first.<br>
      <br>
      Best,<br>
      Rongliang<br>
      <br>
      On 08/18/2016 06:08 PM, Matthew Knepley wrote:<br>
    </div>
    <blockquote
cite="mid:CAMYG4GmMQNxgyQJiOL=i_t_bPnT41aitKXdLu=Wi4M+qxr+jWQ@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div class="gmail_extra">
          <div class="gmail_quote">On Thu, Aug 18, 2016 at 5:05 AM,
            Rongliang Chen <span dir="ltr"><<a
                moz-do-not-send="true"
                href="mailto:rongliang.chan@gmail.com" target="_blank">rongliang.chan@gmail.com</a>></span>
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div bgcolor="#FFFFFF" text="#000000">
                <div>Hi Matt,<br>
                  <br>
                  The log of the valgrind is attached. When I run with
                  valgrind, the following error message comes up.<br>
                </div>
              </div>
            </blockquote>
            <div><br>
            </div>
            <div>The valgrind log says your code is writing over memory.
              Fix that first.</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">
              <div bgcolor="#FFFFFF" text="#000000">
                <div> -------------------------<br>
                  [1]PETSC ERROR: --------------------- Error Message
                  ------------------------------<wbr>------------------------------<wbr>--<br>
                  [1]PETSC ERROR: Arguments are incompatible<br>
                  [1]PETSC ERROR: Cannot change block size 3670016 to 7<br>
                  [1]PETSC ERROR: See <a moz-do-not-send="true"
                    href="http://www.mcs.anl.gov/petsc/documentation/faq.html"
                    target="_blank">http://www.mcs.anl.gov/petsc/<wbr>documentation/faq.html</a>
                  for trouble shooting.<br>
                  [1]PETSC ERROR: Petsc Release Version 3.6.3, Dec, 03,
                  2015 <br>
                  [1]PETSC ERROR: ./fsi on a 64bit-debug named rlchen by
                  rlchen Thu Aug 18 17:59:43 2016<br>
                  [1]PETSC ERROR: Configure options --download-blacs
                  --download-scalapack --download-metis
                  --download-parmetis --download-exodusii
                  --download-netcdf --download-hdf5
                  --with-mpi-dir=/home/rlchen/<wbr>soft/Program/mpich2-shared

                  --with-debugging=1 --download-fblaslapack
                  --with-64-bit-indices<br>
                  [1]PETSC ERROR: #1 PetscLayoutSetBlockSize() line 424
                  in /home/rlchen/soft/petsc-3.6.3/<wbr>src/vec/is/utils/pmap.c<br>
                  [1]PETSC ERROR: #2 MatSetBlockSize() line 6920 in
                  /home/rlchen/soft/petsc-3.6.3/<wbr>src/mat/interface/matrix.c<br>
                  [1]PETSC ERROR: #3 MatXAIJSetPreallocation() line 282
                  in
                  /home/rlchen/soft/3D_fluid/<wbr>FSI/Spmcs-v1.5/Fluid-petsc-3.<wbr>6/src/application/Fluid/<wbr>gcreate.c<br>
                  ----------------------<br>
                  <br>
                  Best regards,<br>
                  Rongliang<br>
                  <br>
                  On 08/18/2016 05:52 PM, Matthew Knepley wrote:<br>
                </div>
                <blockquote type="cite">
                  <div dir="ltr">Run with valgrind and send the log.
                    <div><br>
                    </div>
                    <div>  Thanks,</div>
                    <div><br>
                    </div>
                    <div>     Matt</div>
                  </div>
                  <div class="gmail_extra"><br>
                    <div class="gmail_quote">On Thu, Aug 18, 2016 at
                      3:59 AM, Rongliang Chen <span dir="ltr"><<a
                          moz-do-not-send="true"
                          href="mailto:rongliang.chan@gmail.com"
                          target="_blank">rongliang.chan@gmail.com</a>></span>
                      wrote:<br>
                      <blockquote class="gmail_quote" style="margin:0 0
                        0 .8ex;border-left:1px #ccc
                        solid;padding-left:1ex">Dear All,<br>
                        <br>
                        I try to use the block matrix (BAIJ) for the
                        dmplex data structure with the option
                        "-dm_mat_type baij" (the block size is 7). The
                        code works fine when np = 1 but the following
                        error comes up when np>1. And the code also
                        works fine for np>1 if I set the block size
                        to be 1. Any suggestions are highly appreciated.<br>
                        <br>
                        ------------------------------<wbr>----------------------<br>
                        [1]PETSC ERROR: PetscMallocValidate: error
                        detected at VecAXPY_Seq() line 89 in
                        /home/rlchen/soft/petsc-3.6.3/<wbr>src/vec/vec/impls/seq/bvec1.c<br>
                        [1]PETSC ERROR: Memory at address 0x1332571 is
                        corrupted<br>
                        [1]PETSC ERROR: Probably write past beginning or
                        end of array<br>
                        [1]PETSC ERROR: Last intact block allocated in
                        PetscStrallocpy() line 188 in
                        /home/rlchen/soft/petsc-3.6.3/<wbr>src/sys/utils/str.c<br>
                        [1]PETSC ERROR: --------------------- Error
                        Message ------------------------------<wbr>------------------------------<wbr>--<br>
                        [1]PETSC ERROR: Memory corruption: <a
                          moz-do-not-send="true"
href="http://www.mcs.anl.gov/petsc/documentation/installation.html#valgrind"
                          rel="noreferrer" target="_blank">http://www.mcs.anl.gov/petsc/d<wbr>ocumentation/installation.html<wbr>#valgrind</a><br>
                        [1]PETSC ERROR:<br>
                        [1]PETSC ERROR: See <a moz-do-not-send="true"
                          href="http://www.mcs.anl.gov/petsc/documentation/faq.html"
                          rel="noreferrer" target="_blank">http://www.mcs.anl.gov/petsc/d<wbr>ocumentation/faq.html</a>
                        for trouble shooting.<br>
                        [1]PETSC ERROR: Petsc Release Version 3.6.3,
                        Dec, 03, 2015<br>
                        [1]PETSC ERROR: ./fsi on a 64bit-debug named
                        rlchen by rlchen Thu Aug 18 16:42:34 2016<br>
                        [1]PETSC ERROR: Configure options
                        --download-blacs --download-scalapack
                        --download-metis --download-parmetis
                        --download-exodusii --download-netcdf
                        --download-hdf5 --with-mpi-dir=/home/rlchen/so<wbr>ft/Program/mpich2-shared

                        --with-debugging=1 --download-fblaslapack
                        --with-64-bit-indices<br>
                        [1]PETSC ERROR: #1 PetscMallocValidate() line
                        136 in /home/rlchen/soft/petsc-3.6.3/<wbr>src/sys/memory/mtr.c<br>
                        [1]PETSC ERROR: #2 VecAXPY_Seq() line 89 in
                        /home/rlchen/soft/petsc-3.6.3/<wbr>src/vec/vec/impls/seq/bvec1.c<br>
                        [1]PETSC ERROR: #3 VecAXPY() line 640 in
                        /home/rlchen/soft/petsc-3.6.3/<wbr>src/vec/vec/interface/rvector.<wbr>c<br>
                        ------------------------------<wbr>---------------------<br>
                        <br>
                        Best regards,<br>
                        Rongliang<br>
                      </blockquote>
                    </div>
                    <br>
                    <br clear="all">
                    <span class="HOEnZb"><font color="#888888">
                        <div><br>
                        </div>
                        -- <br>
                        <div data-smartmail="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>
                      </font></span></div>
                </blockquote>
                <br>
              </div>
            </blockquote>
          </div>
          <br>
          <br clear="all">
          <div><br>
          </div>
          -- <br>
          <div class="gmail_signature" data-smartmail="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>
        </div>
      </div>
    </blockquote>
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