It tries to find the executable in PATH, maybe you need mpiexec -n ./app instead of mpiexec -n app.<div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Nov 26, 2012 at 1:35 AM, Zhenglun (Alan) Wei <span dir="ltr"><<a href="mailto:zhenglun.wei@gmail.com" target="_blank">zhenglun.wei@gmail.com</a>></span> wrote:<br>
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    <div>Thank you so much, Dr. Brown. <br>
         Another little question is that: <br>
             After I update the PETSc, the
      ${PETSC_ARCH}/conf/bin/mpiexec does not work and shows:<br>
      [<a href="mailto:mpiexec@...edu" target="_blank">mpiexec@...edu</a>] set_default_values (./ui/mpich/utils.c:1541): no
      executable provided<br>
      [<a href="mailto:mpiexec@...edu" target="_blank">mpiexec@...edu</a>] HYD_uii_mpx_get_parameters
      (./ui/mpich/utils.c:1745): setting default values failed<br>
      [<a href="mailto:mpiexec@...edu" target="_blank">mpiexec@...edu</a>] main (./ui/mpich/mpiexec.c:154): error parsing
      parameters<br>
             Any idea on this?<br>
      <br>
      thanks,<br>
      Alan<br>
      <br>
    </div><div><div class="h5">
    <blockquote type="cite">Sounds like you didn't "hg update" and had a bad
      mergetool or something. You can use hg revert to discard any local
      changes. Since you have many stale files around, you may want to
      use hg clean (this will delete all untracked files!) to get back
      to a state like if you had a fresh clone.
      <div class="gmail_extra">
        <br>
        <br>
        <div class="gmail_quote">On Mon, Nov 26, 2012 at 1:25 AM,
          Zhenglun (Alan) Wei <span dir="ltr"><<a href="mailto:zhenglun.wei@gmail.com" target="_blank">zhenglun.wei@gmail.com</a>></span>
          wrote:<br>
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                <div><br>
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                <blockquote type="cite">On Mon, Nov 26, 2012 at 12:59
                  AM, Zhenglun (Alan) Wei <span dir="ltr"><<a href="mailto:zhenglun.wei@gmail.com" target="_blank">zhenglun.wei@gmail.com</a>></span>
                  wrote:<br>
                  <div class="gmail_extra">
                    <div class="gmail_quote">
                      <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Sean,<br>
                             Thank you so much for your help. Here I
                        have another question.<br>
                             After updating the PETSc, I tried to 'make
                        ex45' in /src/ksp/ksp/example/tutorial/. It says
                        that 'petscksp.h' can not be found; therefore, I
                        commented this library in ex45.c to see what
                        will happen. It, then, shows that the
                        'petscdmmg.h' can not be found. Any idea on
                        this? :)<br>
                      </blockquote>
                      <div><br>
                      </div>
                      <div>Since DMMG is gone, baby gone, this means
                        your environment (PETSC_DIR) is still pointing
                        to an old version of PETSc.</div>
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                   Since my PETSc was updated, the PETSC_DIR of the new
              version of the PETSc should be the same as the old version
              of the PETSc, isn't it? <br>
                   BTW, it works after I re-configure and make the
              PETSc. However, I found that it as a lot of dummy things
              in the ex45.c, i.e.:<br>
              <<<<<<<<<<local<br>
              <br>
              ========<br>
              <br>
              >>>>>>>>>other<br>
              <br>
              =========<br>
              <br>
                   It seems that the update changes the original program
              of ex45.c by adding fractions of the new code into the old
              code. It confused me a lot. Is there any way that I can
              just replace the old code by the new code?<br>
              <br>
              thanks,<br>
              Alan <br>
              <div> <br>
                <blockquote type="cite">
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                      <div> </div>
                      <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <br>
                        thanks,<br>
                        Alan
                        <div>
                          <div><br>
                            <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On Sun, Nov
                              25, 2012 at 4:16 PM, Zhenglun (Alan) Wei<br>
                              <<a href="mailto:zhenglun.wei@gmail.com" target="_blank">zhenglun.wei@gmail.com</a>>

                              wrote:<br>
                              <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Thank you
                                Sean,<br>
                                    I changed the<br>
                                <br>
                                <br>
                                $ cd config/buildsystem<br>
                                $ hg showconfig paths.default<br>
                                    to<br>
                                <a href="https://bitbucket.org/petsc/buildsystem" target="_blank">https://bitbucket.org/petsc/buildsystem</a><br>
                                <br>
                                   It gives me 2 extra changes.<br>
                              </blockquote>
                              Great! Glad to know it's working.<br>
                              <br>
                              <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">    
                                 Although, it always giev me the warning
                                of 'certificate not verified',<br>
                                it updated lots of files. Should I just
                                ignore this warning?<br>
                              </blockquote>
                              You could ignore those warnings, yes, but
                              it would probably be better<br>
                              to upgrade your mercurial and see if the
                              host fingerprint option<br>
                              works. Or you could try to use the ssh
                              protocol, assuming your<br>
                              university proxy allows ssh out.<br>
                              <br>
                              <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">    BTW,
                                the reason I used 'https' instead of
                                'http' is that 'https' is shown<br>
                                in the website you gave to me. :) It may
                                needs to be changed.<br>
                              </blockquote>
                              Well, as I said previously, bitbucket
                              redirects all http traffic to<br>
                              https, so I don't think changing it to
                              just http would really work.<br>
                            </blockquote>
                            <br>
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