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The matrix was saved as with this code: CALL PetscViewerBinaryOpen(PETSC_COMM_WORLD, filename, FILE_MODE_WRITE, viewer, ier) CALL PetscViewerPushFormat(viewer, PETSC_VIEWER_DEFAULT, ier) CALL MatView(A, viewer, ier) CALL PetscViewerDestroy(viewer,
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<meta charset="utf-8"></head><body><pre style="font-family: sans-serif; font-size: 100%; white-space: pre-wrap; word-wrap: break-word">The matrix was saved as with this code:
CALL PetscViewerBinaryOpen(PETSC_COMM_WORLD, filename, FILE_MODE_WRITE, viewer, ier)
CALL PetscViewerPushFormat(viewer, PETSC_VIEWER_DEFAULT, ier)
CALL MatView(A, viewer, ier)
CALL PetscViewerDestroy(viewer, ier)
I will try again to check for file corruption
________________________________________
From: Stefano Zampini <stefano.zampini@gmail.com>
Sent: Thursday, June 6, 2024 3:01 PM
To: Klaij, Christiaan
Cc: PETSc users list
Subject: Re: [petsc-users] matload and petsc4py
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On Thu, Jun 6, 2024, 14:53 Klaij, Christiaan <C.Klaij@marin.nl<mailto:C.Klaij@marin.nl>> wrote:
I'm writing a matrix to file from my fortran code (that uses petsc-3. 19. 4) with -mat_view binary. Then, I'm trying to load this mat into python (that uses petsc-3. 21. 0). This works fine using single or multiple procs when the marix
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I'm writing a matrix to file from my fortran code (that uses petsc-3.19.4) with -mat_view binary. Then, I'm trying to load this mat into python (that uses petsc-3.21.0). This works fine using single or multiple procs when the marix was written using a single proc (attached file a_mat_np_1.dat). However, when the matrix was written using mulitple procs (attached file a_mat_n_2.dat) I get the error below. Is this supposed to work? If so, what I'm I doing wrong?
This should work. And your script seems ok too . How did you save the matrix in parallel? I suspect that file is corrupt
$ cat test_matrixImport_binary.py
import sys
import petsc4py
from petsc4py import PETSc
from mpi4py import MPI
# mat files
#filename = "./a_mat_np_1.dat" # Works
filename = "./a_mat_np_2.dat" # Doesn't work
# Initialize PETSc
petsc4py.init(sys.argv)
# Create a viewer for reading the binary file
viewer = PETSc.Viewer().createBinary(filename, mode='r', comm=PETSc.COMM_WORLD)
# Create a matrix and load data from the binary file
A = PETSc.Mat().create(comm=PETSc.COMM_WORLD)
A.load(viewer)
$ python test_matrixImport_binary.py
Traceback (most recent call last):
File "/projects/P35662.700/test_cklaij/test_matrixImport_binary.py", line 18, in <module>
A.load(viewer)
File "petsc4py/PETSc/Mat.pyx", line 2025, in petsc4py.PETSc.Mat.load
petsc4py.PETSc.Error: error code 79
[0] MatLoad() at /home/cklaij/petsc-3.21.0/src/mat/interface/matrix.c:1344
[0] MatLoad_SeqAIJ() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/seq/aij.c:5091
[0] MatLoad_SeqAIJ_Binary() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/seq/aij.c:5142
[0] Unexpected data in file
[0] Inconsistent matrix data in file: nonzeros = 460, sum-row-lengths = 761
$ mpirun -n 2 python test_matrixImport_binary.py
Traceback (most recent call last):
File "/projects/P35662.700/test_cklaij/test_matrixImport_binary.py", line 18, in <module>
Traceback (most recent call last):
File "/projects/P35662.700/test_cklaij/test_matrixImport_binary.py", line 18, in <module>
A.load(viewer)
File "petsc4py/PETSc/Mat.pyx", line 2025, in petsc4py.PETSc.Mat.load
A.load(viewer)
File "petsc4py/PETSc/Mat.pyx", line 2025, in petsc4py.PETSc.Mat.load
petsc4py.PETSc.Error: error code 79
[0] MatLoad() at /home/cklaij/petsc-3.21.0/src/mat/interface/matrix.c:1344
[0] MatLoad_MPIAIJ() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/mpi/mpiaij.c:3035
[0] MatLoad_MPIAIJ_Binary() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/mpi/mpiaij.c:3087
[0] Unexpected data in file
[0] Inconsistent matrix data in file: nonzeros = 460, sum-row-lengths = 761
petsc4py.PETSc.Error: error code 79
[1] MatLoad() at /home/cklaij/petsc-3.21.0/src/mat/interface/matrix.c:1344
[1] MatLoad_MPIAIJ() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/mpi/mpiaij.c:3035
[1] MatLoad_MPIAIJ_Binary() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/mpi/mpiaij.c:3087
[1] Unexpected data in file
[1] Inconsistent matrix data in file: nonzeros = 460, sum-row-lengths = 761
[cid:ii_18feda229ee74859a161]
dr. ir. Christiaan Klaij
| Senior Researcher | Research & Development
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