<div dir="ltr"><div><div><div>Hi Joe,<br><br></div>Is it possible that you're using a different MPI for your builds? I'm wondering if the previous MPI version didn't require mpirun in order to run a single process while the current one does.<br><br>What you can do though is to use the "--no-mpi" option which will skip initializing and finalizing MPI but also make the MPI required filters and readers not available. It's possible that the CMake PARAVIEW_INITIALIZE_MPI_ON_CLIENT option got switched from OFF to ON. It it is OFF by default but PV is still built with MPI you can do a --mpi to have the GUI or pvpython initialize and finalize MPI.<br><br></div>Most filters (actually, I'm not aware of any) don't explicitly rely on MPI for single process runs but there are a couple of readers that use MPI IO.<br><br></div><div>Best,<br></div><div>Andy<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 7, 2018 at 9:02 AM, Hennessey, Joseph G CTR USARMY RDECOM ARL (US) <span dir="ltr"><<a href="mailto:joseph.g.hennessey2.ctr@mail.mil" target="_blank">joseph.g.hennessey2.ctr@mail.mil</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
I have noticed that when building ParaView 5.5.0-RC1-1 with an external<br>
MPI version that pvpython and paraview itself are now being built such<br>
that they can not be executed without mpirun.<br>
<br>
For example this would work with ParaView 5.4.1<br>
<br>
paraview<br>
pvpython<br>
mpirun -n 1 pvbatch<br>
<br>
While for ParaView 5.5.0-RC1-1 I have to do the following<br>
<br>
mpirun -n 1 paraview<br>
mpirun -n 1 pvpython<br>
mpirun -n 1 pvbatch<br>
<br>
as running<br>
<br>
paraview<br>
pvpython<br>
<br>
without mpirun will no longer work and complain about<br>
attempting to run an mpi required program without mpi,<br>
as has been the case with pvbatch in the past.<br>
<br>
Is this an intentional change, or is this an unintended consequence<br>
of some other change?<br>
<br>
Thanks,<br>
<br>
Joe<br>
<br>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<wbr>~~~~~<br>
Joseph G. Hennessey Ph.D., SAIC<br>
Team SAIC<br>
Army Research Lab<br>
DOD Supercomputing Resource Center<br>
Email: <a href="mailto:joseph.g.hennessey2.ctr@mail.mil">joseph.g.hennessey2.ctr@mail.<wbr>mil</a><br>
<br>
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