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

[Jed Brown]

Mark Adams <mfadams at lbl.gov> writes:

> 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.

Set different prefixes for each solver (or group, if on different
subcomms) and only -prefix123_ksp_monitor the ones you want to see.
Note that you can monitor to different files

  -prefix123_ksp_monitor output123.log
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