[petsc-users] Writing matrix to file with MPIIO

[Guo, Hanqi]

Hi, 

I am trying to write a sparse matrix to file with MPIIO but failed.  I got the same error on vesta (gpfs), my Macbook (local disk), and a linux machine (nfs).  The followings are my code snippet and error output.  Could anyone help me check the code?  Thanks!  

...
    MatCreate(PETSC_COMM_WORLD, &mat);
    MatSetType(mat, MATMPIAIJ);
    MatSetSizes(mat, PETSC_DECIDE, PETSC_DECIDE, n, n);
    MatSetUp(mat);
...
    // write matrix
...
    MatAssemblyBegin(mat, MAT_FINAL_ASSEMBLY);
    MatAssemblyEnd(mat, MAT_FINAL_ASSEMBLY);

    PetscViewer viewer; 
    PetscViewerCreate(PETSC_COMM_WORLD, &viewer); 
    PetscViewerSetType(viewer, PETSCVIEWERBINARY);
    PetscViewerFileSetMode(viewer, FILE_MODE_WRITE);
    PetscViewerFileSetName(viewer, "sfm.mat");
    PetscViewerBinarySetUseMPIIO(viewer, PETSC_TRUE);
    MatView(mat, viewer);
    PetscViewerDestroy(&viewer);
...


[0]PETSC ERROR: --------------------- Error Message --------------------------------------------------------------
[0]PETSC ERROR: Write to file failed
[0]PETSC ERROR: Error writing to file total size 4 err -1 wsize 16
[0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for trouble shooting.
[0]PETSC ERROR: Petsc Release Version 3.6.3, Dec, 03, 2015 
[0]PETSC ERROR: Unknown Name on a arch-linux2-c-debug named compute001 by hguo Sat Feb 27 21:40:04 2016
[0]PETSC ERROR: Configure options —prefix=(hidden) --with-fc=0 --download-f2cblaslapack --with-mpi-dir=(hidden) --with-precision=single
[0]PETSC ERROR: #1 PetscBinaryWrite() line 405 in (hidden)/petsc-3.6.3/src/sys/fileio/sysio.c
[0]PETSC ERROR: #2 MatView_MPIAIJ_Binary() line 1219 in (hidden)/petsc-3.6.3/src/mat/impls/aij/mpi/mpiaij.c
[0]PETSC ERROR: #3 MatView_MPIAIJ_ASCIIorDraworSocket() line 1385 in (hidden)/petsc-3.6.3/src/mat/impls/aij/mpi/mpiaij.c
[0]PETSC ERROR: #4 MatView_MPIAIJ() line 1470 in (hidden)/petsc-3.6.3/src/mat/impls/aij/mpi/mpiaij.c
[0]PETSC ERROR: #5 MatView() line 886 in (hidden)/petsc-3.6.3/src/mat/interface/matrix.c


---------------
Hanqi Guo
Postdoctoral Appointee
Mathematics and Computer Science Division
Argonne National Laboratory
9700 S. Cass Ave., Bldg 240
Argonne, IL 60439
e-mail: hguo at anl.gov
web: http://www.mcs.anl.gov/~hguo
phone: 630-252-7225

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