[petsc-users] fieldsplit: Unhandled case, must have at least two fields, not 1!

[Mark Adams]

>
> >   else ! 1 field 00 solver, no prefix
> >      call PetscOptionsClearValue('-ksp_monitor',ierr)
> >      call PetscOptionsClearValue('-ksp_converged_reason',ierr)
>
> Yuck.  The options table is for the (run-time) user.  Manually futzing
> with options, especially clearing options, is a dirty hack that should
> not be used by choice.
>
> What is an alternative?  We have several solves on subcommuncators and I
don't want to clutter the output with the monitors from all of these
solves.  This is effective and it is just used for diagnostics.
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