[petsc-users] questions about KSP with-pc_type hypre

[Jed Brown]

Roc Wang <pengxwang at hotmail.com> writes:
>>    What happens with -pc_type lu?  Does it solve the linear system and give back answers you expect?
>
> No, it doesn't work if I use -pc_type lu. The error information shows:
>
> [0]PETSC ERROR: --------------------- Error Message ------------------------------------
> [0]PETSC ERROR: No support for this operation for this object type!
> [0]PETSC ERROR: Matrix format mpiaij does not have a built-in PETSc LU!

If you must run in parallel, either use a third-party solver such as
-pc_type lu -pc_factor_mat_solver_package superlu_dist (configure with
--download-superlu_dist) or use -pc_type redundant (for testing).

I recommend getting your solver working in serial first.
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