[petsc-users] Problem in Loading Matrix in Examples

[Matthew Knepley]

On Tue, Feb 5, 2019 at 4:44 AM Eda Oktay via petsc-users <
petsc-users at mcs.anl.gov> wrote:

> Hi,
>
> I am new in PETSc and trying to run some examples in MAT file.
>
> I cannot run the ones that need to load matrix from file. Here are the
> examples:
>
> For ex12 in MAT file:
> args: -f0
> ${wPETSC_DIR}/share/petsc/datafiles/matrices/ns-real-int32-float64
> requires: double !complex !define(PETSC_USE_64BIT_INDICES)
>
> When I type ./ex11 -f0
> home/petsc-3.10.3/share/petsc/datafiles/matrices/ns-real-int32-float64, I
> get the following error message:
>
> [0]PETSC ERROR: --------------------- Error Message
> --------------------------------------------------------------
> [0]PETSC ERROR: No support for this operation for this object type
> [0]PETSC ERROR: This example is for exactly two processes
>

As it says above, the example is for 2 processes, but you are running it on
1.

   Matt


> [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html
> for trouble shooting.
> [0]PETSC ERROR: Petsc Release Version 3.10.3, Dec, 18, 2018
> [0]PETSC ERROR: ./ex11 on a arch-linux2-c-debug named bb91.wls.metu.edu.tr
> by edaoktay Tue Feb  5 12:41:49 2019
> [0]PETSC ERROR: Configure options --with-cc=gcc --with-cxx=g++
> --with-fc=gfortran --with-cxx-dialect=C++11 --download-openblas
> --download-metis --download-parmetis --download-superlu_dist
> --download-slepc --download-mpich
> [0]PETSC ERROR: #1 main() line 31 in
> /home/edaoktay/petsc-3.10.3/src/mat/examples/tutorials/ex11.c
> [0]PETSC ERROR: PETSc Option Table entries:
> [0]PETSC ERROR: -f0
> home/petsc-3.10.3/share/petsc/datafiles/matrices/ns-real-int32-float64
> [0]PETSC ERROR: ----------------End of Error Message -------send entire
> error message to petsc-maint at mcs.anl.gov----------
> application called MPI_Abort(MPI_COMM_WORLD, 56) - process 0
> [unset]: write_line error; fd=-1 buf=:cmd=abort exitcode=56
> :
> system msg for write_line failure : Bad file descriptor
>
>
> For ex10 in MAT file:
> suffix: seqaij
> requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES)
> args: -f ${DATAFILESPATH}/matrices/small -a_mat_type seqaij
>
> There is not a matrix called small, however during configuration, it
> should be tested successfully and there is an output. Also, I get pretty
> much the same error here too.
>
> I believe there is a problem in requirements but I cannot find any
> solution.
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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