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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
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head><body><div>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?<br /><br />$ cat test_matrixImport_binary.py<br />import sys<br />import petsc4py<br />from petsc4py import PETSc<br />from mpi4py import MPI<br /><br /># mat files<br />#filename = "./a_mat_np_1.dat" # Works<br />filename = "./a_mat_np_2.dat" # Doesn't work<br /><br /># Initialize PETSc<br />petsc4py.init(sys.argv)<br /><br /># Create a viewer for reading the binary file<br />viewer = PETSc.Viewer().createBinary(filename, mode='r', comm=PETSc.COMM_WORLD)<br /><br /># Create a matrix and load data from the binary file<br />A = PETSc.Mat().create(comm=PETSc.COMM_WORLD)<br />A.load(viewer)<br /><br />$ python test_matrixImport_binary.py <br />Traceback (most recent call last):<br /> File "/projects/P35662.700/test_cklaij/test_matrixImport_binary.py", line 18, in <module><br /> A.load(viewer)<br /> File "petsc4py/PETSc/Mat.pyx", line 2025, in petsc4py.PETSc.Mat.load<br />petsc4py.PETSc.Error: error code 79<br />[0] MatLoad() at /home/cklaij/petsc-3.21.0/src/mat/interface/matrix.c:1344<br />[0] MatLoad_SeqAIJ() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/seq/aij.c:5091<br />[0] MatLoad_SeqAIJ_Binary() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/seq/aij.c:5142<br />[0] Unexpected data in file<br />[0] Inconsistent matrix data in file: nonzeros = 460, sum-row-lengths = 761<br /><br />$ mpirun -n 2 python test_matrixImport_binary.py <br />Traceback (most recent call last):<br /> File "/projects/P35662.700/test_cklaij/test_matrixImport_binary.py", line 18, in <module><br />Traceback (most recent call last):<br /> File "/projects/P35662.700/test_cklaij/test_matrixImport_binary.py", line 18, in <module><br /> A.load(viewer)<br /> File "petsc4py/PETSc/Mat.pyx", line 2025, in petsc4py.PETSc.Mat.load<br /> A.load(viewer)<br /> File "petsc4py/PETSc/Mat.pyx", line 2025, in petsc4py.PETSc.Mat.load<br />petsc4py.PETSc.Error: error code 79<br />[0] MatLoad() at /home/cklaij/petsc-3.21.0/src/mat/interface/matrix.c:1344<br />[0] MatLoad_MPIAIJ() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/mpi/mpiaij.c:3035<br />[0] MatLoad_MPIAIJ_Binary() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/mpi/mpiaij.c:3087<br />[0] Unexpected data in file<br />[0] Inconsistent matrix data in file: nonzeros = 460, sum-row-lengths = 761<br />petsc4py.PETSc.Error: error code 79<br />[1] MatLoad() at /home/cklaij/petsc-3.21.0/src/mat/interface/matrix.c:1344<br />[1] MatLoad_MPIAIJ() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/mpi/mpiaij.c:3035<br />[1] MatLoad_MPIAIJ_Binary() at /home/cklaij/petsc-3.21.0/src/mat/impls/aij/mpi/mpiaij.c:3087<br />[1] Unexpected data in file<br />[1] Inconsistent matrix data in file: nonzeros = 460, sum-row-lengths = 761<br /><br /><br /></div><div dir="ltr" style="mso-line-height-rule:exactly;-webkit-text-size-adjust:100%;font-size:1px;direction:ltr;"><table cellpadding="0" cellspacing="0" border="0" 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