On Wed, Apr 25, 2012 at 16:06, Dominik Szczerba <dominik at itis.ethz.ch>wrote:
> I am happy to be guilty if I know how I can improve: why do I get the > right results without this option, for several cases? > How do you define "right results"? Is SNES converging quadratically when you do not use -snes_mf_operator? > > > Run with -snes_type test and see what it reports. > > The moment I specify this option I get: > > [0]PETSC ERROR: Invalid argument! > [0]PETSC ERROR: Cannot test with alternative preconditioner! > > tracing back to SNESSolve() > You either (a) set different matrices for the operator and preconditioning matrix or (b) passed -snes_mf. Just pass one matrix. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120425/19a14a00/attachment.htm>
