> > PCILU and PCICC are not supported for MPISBAIJ matrix type > > (the error message should indicate this problem). > > For sequential sbaij matrix, you can use PCICC. > > For parallel, you may try the default petsc preconditioner > > block jacobi + icc. See Chapter 4 of petsc user manual. > > > > Ok i see. > > The problem came from the call to KSPSetUp, when using one MPI task, > this call end in MatILUFactorSymbolic with the error message about > symbolic ILU with Matrix type seqsbaij. > > With more than one MPI task, there is no more error.
I would suggest you using '-ksp_view' to check which default solvers are being used for both cases. I guess the "block jacobi + icc" is used on parallel implementation. Hong
