[petsc-users] Petsc reread options file and FIELDSPLIT null size

[Hoang Giang Bui]

Hello

Is it possible to reread the options file since I like to experiment
different solver configuration during time stepping?

In addition, I got an error with FIELDSPLIT when a split has zero size
(That happens in the first step when one field is disabled). Below is the
error message on the proc 0:

[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: Caught signal number 8 FPE: Floating Point
Exception,probably divide by zero
[0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
[0]PETSC ERROR: or see
http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind
[0]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS X
to find memory corruption errors
[0]PETSC ERROR: configure using --with-debugging=yes, recompile, link, and
run
[0]PETSC ERROR: to get more information on the crash.
[0]PETSC ERROR: --------------------- Error Message
--------------------------------------------------------------
[0]PETSC ERROR: Signal received
[0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for
trouble shooting.
[0]PETSC ERROR: Petsc Release Version 3.6.3, Dec, 03, 2015
[0]PETSC ERROR: python on a arch-linux2-cxx-opt named bermuda by hbui Wed
Feb 24 10:00:34 2016
[0]PETSC ERROR: Configure options --with-shared-libraries
--with-debugging=0 --with-pic --with-clanguage=cxx
--download-fblas-lapack=yes --download-ptscotch=yes --download-metis=yes
--download-parmetis=yes --download-scalapack=yes --download-mumps=yes
--download-hypre=yes --download-ml=yes --download-klu=yes
--download-pastix=yes --with-mpi-dir=/opt/openmpi-1.10.1
--prefix=/home/hbui/opt/petsc-3.6.3
[0]PETSC ERROR: #1 User provided function() line 0 in  unknown file

Do you have any comments?

Giang
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