Run in a debugger and/or use --with-debugging=1 so that the error trace has more information. You could also show us the exact code that you used. On Apr 22, 2012 2:03 PM, "TAY wee-beng" <zonexo at gmail.com> wrote:
> Hi, > > I added "Vec x,b" after "KSP ksp" > and then "call KSPGetSolution(ksp, x, ierr)" > > I wanted to see the output so I added "call VecView(x,ierr)" but I got > this error: > > [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]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: > ------------------------------------------------------------------------ > [0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 5, Sat Oct 29 13:45:54 > 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: ./ex22f on a arch-linu named hpc12 by wtay Sun Apr 22 > 21:02:14 2012 > [0]PETSC ERROR: Libraries linked from > /home/wtay/Lib/petsc-3.2-p5_mumps_rel/lib > [0]PETSC ERROR: Configure run at Sun Nov 27 15:18:15 2011 > [0]PETSC ERROR: Configure options --with-mpi-dir=/opt/openmpi-1.5.3/ > --with-blas-lapack-dir=/opt/intel_xe_2011/mkl/lib/intel64/ > --with-debugging=0 --download-hypre=1 > --prefix=/home/wtay/Lib/petsc-3.2-p5_mumps_rel COPTFLAGS=-O3 FOPTFLAGS=-O3 > --download-mumps=1 --download-parmetis=1 --download-scalapack=1 > --download-blacs=1 > [0]PETSC ERROR: > ------------------------------------------------------------------------ > [0]PETSC ERROR: User provided function() line 0 in unknown directory > unknown file > -------------------------------------------------------------------------- > MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD > with errorcode 59. > > > Yours sincerely, > > TAY wee-beng > > > On 22/4/2012 2:53 PM, Matthew Knepley wrote: > > On Sun, Apr 22, 2012 at 3:31 AM, TAY wee-beng <zonexo at gmail.com> wrote: > >> Hi, >> >> I am using petsc-dev 2012-04-20. >> >> Btw, I'm referring to : >> >> >> http://www.mcs.anl.gov/petsc/petsc-dev/src/ksp/ksp/examples/tutorials/ex22f.F.html >> >> Part of the code is : >> >> call KSPSetFromOptions(ksp,ierr) >> call KSPSetUp(ksp,ierr) >> call KSPSolve(ksp,PETSC_NULL_OBJECT,PETSC_NULL_OBJECT,ierr) >> call KSPDestroy(ksp,ierr) >> call DMDestroy(da,ierr) >> call PetscFinalize(ierr) >> >> >> >> Unlike other codes like ex29c or ex45c, there isn't a "call >> KSPGetSolution(ksp,x,ierr)" >> > > You need to declare "Vec x", and then you can call KSPGetSolution(ksp, > x, ierr) > > Matt > > >> Also I want to add "call VecView(x,ierr)" to print out the results, >> which is usally added after the above. >> >> Thank you >> >> Yours sincerely, >> >> TAY wee-beng >> >> >> On 22/4/2012 1:14 AM, Matthew Knepley wrote: >> >> On Sat, Apr 21, 2012 at 6:31 PM, TAY wee-beng <zonexo at gmail.com> wrote: >> >>> Hi, >>> >>> May I know if ex22f is complete? I can't find : >>> >>> call KSPGetSolution(ksp,x,ierr) >>> >>> If I entered it, it says x not found. >>> >> >> This is correct in petsc-dev. What version are you using? >> >> Thanks, >> >> Matt >> >> >>> Thank you! >>> >>> -- >>> Yours sincerely, >>> >>> TAY wee-beng >>> >>> >> >> >> -- >> What most experimenters take for granted before they begin their >> experiments is infinitely more interesting than any results to which their >> experiments lead. >> -- Norbert Wiener >> >> > > > -- > What most experimenters take for granted before they begin their > experiments is infinitely more interesting than any results to which their > experiments lead. > -- Norbert Wiener > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120422/faa2d036/attachment.htm>
