You are right! I do calculate the Jacobian and Preconditioning matrice in FormJacobian function with Mat context. When I used "-snes_mf_operator" I received the error:
[0]PETSC ERROR: --------------------- Error Message ------------------------------------ [0]PETSC ERROR: No support for this operation for this object type! [0]PETSC ERROR: Mat type mffd! [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 3, Fri Sep 30 10:28:33 CDT 2011 [0]PETSC ERROR: See docs/changes/index.html for recent updates. [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting. [0]PETSC ERROR: See docs/index.html for manual pages. [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: ./code on a linux-gnu named behzad-desktop by behzad Tue Jun 12 22:01:48 2012 [0]PETSC ERROR: Libraries linked from /home/behzad/softs/petsc/linux-gnu-cxx-debug/lib [0]PETSC ERROR: Configure run at Sat Dec 17 10:21:01 2011 [0]PETSC ERROR: Configure options --with-cc=gcc --with-cxx=g++ --download-f2cblaslapack=1 --download-mpich=1 --download-hypre --download-parms --with-clanguage=cxx -with-debugging=no [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: MatZeroEntries() line 5186 in src/mat/interface/matrix.c [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation, probably memory access out of range [0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger [0]PETSC ERROR: or see http://www.mcs.anl.gov/petsc/petsc-as/documentation/faq.html#valgrind[0]PETSCERROR: 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: ------------------------------------------------------------------------ [0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 3, Fri Sep 30 10:28:33 CDT 2011 [0]PETSC ERROR: See docs/changes/index.html for recent updates. [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting. [0]PETSC ERROR: See docs/index.html for manual pages. [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: ./code on a linux-gnu named behzad-desktop by behzad Tue Jun 12 22:01:48 2012 [0]PETSC ERROR: Libraries linked from /home/behzad/softs/petsc/linux-gnu-cxx-debug/lib [0]PETSC ERROR: Configure run at Sat Dec 17 10:21:01 2011 [0]PETSC ERROR: Configure options --with-cc=gcc --with-cxx=g++ --download-f2cblaslapack=1 --download-mpich=1 --download-hypre --download-parms --with-clanguage=cxx -with-debugging=no [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: User provided function() line 0 in unknown directory unknown file application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0 [cli_0]: aborting job: application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0 make: [run] Error 59 (ignored) On Tue, Jun 12, 2012 at 8:47 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote: > On Tue, Jun 12, 2012 at 11:12 AM, behzad baghapour < > behzad.baghapour at gmail.com> wrote: > >> Thank you. Now, I received the error which I should change Mat into mffd. > > > *Always* include the entire error message! > > You have to assemble a matrix to use most preconditioners. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120612/7f5ec32c/attachment.html>
