Hello PETSc's users, I have just started to use PETSc and when I try to solve the matricial system I obtain the following error sentences:
[0]PETSC ERROR: MatLUFactorNumeric_SeqAIJ() line 538 in src/mat/impls/aij/seq/aijfact.c [0]PETSC ERROR: Detected zero pivot in LU factorization see http://www.mcs.anl.gov/petsc/petsc-2/documentation/troubleshooting.html#ZeroPivot! [0]PETSC ERROR: Zero pivot row 277017 value 2.16144e-10 tolerance 1e-12 * rs 526.244! [0]PETSC ERROR: MatLUFactorNumeric() line 1843 in src/mat/interface/matrix.c [0]PETSC ERROR: PCSetUp_ILU() line 854 in src/ksp/pc/impls/ilu/ilu.c [0]PETSC ERROR: PCSetUp() line 797 in src/ksp/pc/interface/precon.c [0]PETSC ERROR: KSPSetUp() line 232 in src/ksp/ksp/interface/itfunc.c [0]PETSC ERROR: PCSetUpOnBlocks_BJacobi_Singleblock() line 747 in src/ksp/pc/impls/bjacobi/bjacobi.c [0]PETSC ERROR: PCSetUpOnBlocks() line 830 in src/ksp/pc/interface/precon.c [0]PETSC ERROR: KSPSetUpOnBlocks() line 156 in src/ksp/ksp/interface/itfunc.c [0]PETSC ERROR: KSPSolve() line 344 in src/ksp/ksp/interface/itfunc.c I would be really grateful if you could say to me where the problem could be in order to sort it out. Thanks in advance and best regards Isa