On Sat, Aug 27, 2011 at 12:22, Milan Mitrovic <milan.v.mitrovic at gmail.com>wrote:
> [1]PETSC ERROR: Unknown Mat type given: same! What kind of Mat were you assembling? Are you passing any other flags? What does your code assemble for the Jacobian? I think the Jacobian you passed in does not implement MatDuplicate(). I just changed MatConvert() to be more robust in petsc-dev. With 3.1, you can try -pc_type lu -snes_monitor -ksp_monitor_singular_value. Also compare output with -snes_mf_operator. I think your Jacobian may be singular and this should help figure that out. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110827/ab29fb10/attachment.htm>
