On Sat, 31 Jan 2026, Srinivas Kirthy K wrote:
> Hi Satish,
>
> I included this line in the makefile:
>
> *mpiexec: "${PETSC_DIR}/${PETSC_ARCH}/bin/mpiexec" *
>
> Was able to compile, still getting the same error when I run *mpiexec -n 1
> ./ex50 -da_grid_x 4 -da_grid_y 4 -mat_view*
>
> Anything that I'm doing wrong?
Use:
/home/skirthy/petsc/arch-linux-c-debug/bin/mpiexec -n 1 ./ex50 -da_grid_x 4
-da_grid_y 4 -mat_view
Satish
>
> Thanks.
>
>
> On Sat, Jan 31, 2026 at 10:54 AM Satish Balay <[email protected]>
> wrote:
>
> > >>>>
> > Configure Options: --configModules=PETSc.Configure
> > --optionsModule=config.compilerOptions --download-mpich
> > --download-fblaslapack
> > <<<<
> >
> > Ok - so you've installed MPI via --download-mpich - so you need to use:
> >
> > >>>
> > mpiexec: /home/skirthy/petsc/arch-linux-c-debug/bin/mpiexec
> > <<<
> >
> > [likely mpiexec used below is a different one]
> >
> > Satish
> >
> > On Sat, 31 Jan 2026, Srinivas Kirthy K wrote:
> >
> > > Hi,
> > >
> > > I'm new to PETSc.
> > >
> > > I was able to compile ex50.c using:
> > > *cd petsc/src/ksp/ksp/tutorials*
> > > *make ex50*
> > >
> > > When I run: *mpiexec -n 1 ./ex50 -da_grid_x 4 -da_grid_y 4 -mat_view*
> > >
> > > I get the error message in *PETSC_mpiexec_error.txt *(attached)
> > >
> > > I've defined these in the ~/.bashrc:
> > >
> > > *export PETSC_DIR=$HOME/petsc # added on 31/01/2026 to define PETSC
> > > locationexport PETSC_ARCH=arch-linux-c-debug*
> > >
> > > Can you help me fix this?
> > >
> > > I've attached the *configure.log* file as well.
> > >
> > > Thanks in advance.
> > >
> > >
> >
> >
>
>
