[petsc-users] Expecting Explanation

[Fazlul Huq]

I tried to reconfigure PETSc and I got the following error message:
..................................................................................................................
Unable to find mpi in default locations!
Perhaps you can specify with --with-mpi-dir=<directory>
If you do not want MPI, then give --with-mpi=0
You might also consider using --download-mpich instead
.................................................................................................................
I also got this error message last time when I have installed first and I
have used --download-mpich command.

The log file is attached herewith along with terminal screenshot.
I am not sure what to do now.

Thanks.
Sincerely,
Huq


On Sat, Nov 17, 2018 at 5:26 PM Smith, Barry F. <bsmith at mcs.anl.gov> wrote:

>
>    Then use
>
>      ${PETSC_DIR}/${PETSC_ARCH}/bin/mpiexec
>
>   don't just use the random (wrong) mpiexec that is in your path.
>
>    Barry
>
>
> > On Nov 17, 2018, at 5:22 PM, Fazlul Huq <huq2090 at gmail.com> wrote:
> >
> > I think when I have installed PETSc, I did --download-mpich.
> > How can I correct it? Shall I install PETSc again?
> >
> > Thanks.
> > Sincerely,
> > Huq
> >
> > On Sat, Nov 17, 2018 at 4:53 PM Smith, Barry F. <bsmith at mcs.anl.gov>
> wrote:
> >
> >
> > > On Nov 17, 2018, at 3:51 PM, Fazlul Huq via petsc-users <
> petsc-users at mcs.anl.gov> wrote:
> > >
> > > Thanks for the answer.
> > >
> > > So, when I run the code with "mpiexec -n 2 ./ex6" or "mpiexec -n 4
> ./ex6" shouldn't it spit out
> > > the error "This is a uniprocessor example only!"?
> > > But it didn't do that rather run the code 2/4 times.
> >
> >    This can happen if you use the "wrong" mpiexec; that is a different
> mpiexec than the one associated with the mpi you built PETSc with. For
> example if some mpiexec is in your path and you used ./configure
> --download-mpich
> >
> >    Barry
> >
> >
> > >
> > > Thanks.
> > > Sincerely,
> > > Huq
> > >
> > > On Sat, Nov 17, 2018 at 1:12 PM Fazlul Huq <huq2090 at gmail.com> wrote:
> > > Hello PETSc developers,
> > >
> > > In example 6 or vec section I don't understand this line:
> > > if (size != 1) SETERRQ(PETSC_COMM_SELF,1,"This is a uniprocessor
> example only!");
> > >
> > > I tried to run the code with "mpiexec -n 2 ./ex6" or "mpiexec -n 4
> ./ex6" or even "mpiexec -n 1 ./ex6" it the code runs properly.
> > >
> > > Thanks.
> > >
> > > Sincerely,
> > > Huq
> > >
> > > --
> > >
> > > Fazlul Huq
> > > Graduate Research Assistant
> > > Department of Nuclear, Plasma & Radiological Engineering (NPRE)
> > > University of Illinois at Urbana-Champaign (UIUC)
> > > E-mail: huq2090 at gmail.com
> > >
> > >
> > > --
> > >
> > > Fazlul Huq
> > > Graduate Research Assistant
> > > Department of Nuclear, Plasma & Radiological Engineering (NPRE)
> > > University of Illinois at Urbana-Champaign (UIUC)
> > > E-mail: huq2090 at gmail.com
> >
> >
> >
> > --
> >
> > Fazlul Huq
> > Graduate Research Assistant
> > Department of Nuclear, Plasma & Radiological Engineering (NPRE)
> > University of Illinois at Urbana-Champaign (UIUC)
> > E-mail: huq2090 at gmail.com
>
>

-- 

Fazlul Huq
Graduate Research Assistant
Department of Nuclear, Plasma & Radiological Engineering (NPRE)
University of Illinois at Urbana-Champaign (UIUC)
E-mail: huq2090 at gmail.com
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