[petsc-users] Write binary to matrix

[Matthew Knepley]

On Thu, Sep 22, 2016 at 5:42 AM, Florian Lindner <mailinglists at xgm.de>
wrote:

> Hello,
>
> I want to write a MATSBAIJ to a file in binary, so that I can load it
> later using MatLoad.
>
> However, I keep getting the error:
>
> [5]PETSC ERROR: No support for this operation for this object type!
> [5]PETSC ERROR: Cannot get subcomm viewer for binary files or sockets
> unless SubViewer contains the rank 0 process
> [6]PETSC ERROR: PetscViewerGetSubViewer_Binary() line 46 in
> /data/scratch/lindnefn/software/petsc/src/sys/classes/viewer/impls/binary/
> binv.c
>

Do not truncate the stack.

Run under valgrind.

  Thanks,

     Matt


> The rank 0 is included, as you can see below, I use PETSC_COMM_WORLD and
> the matrix is also created like that.
>
> The code looks like:
>
> PetscErrorCode ierr = 0;
> PetscViewer viewer;
> PetscViewerBinaryOpen(PETSC_COMM_WORLD, filename.c_str(),
> FILE_MODE_WRITE, &viewer); CHKERRV(ierr);
> MatView(matrix, viewer); CHKERRV(ierr);
> PetscViewerDestroy(&viewer);
>
> Thanks,
> Florian
>



-- 
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
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