On Wed, Oct 27, 2010 at 10:26, Benjamin Sanderse <B.Sanderse@cwi.nl> wrote:

PetscInt iterations;
ierr = KSPGetIterationNumber(ksp,&iterations);CHKERRQ(ierr);
fd = PETSC_VIEWER_SOCKET_WORLD;
ierr = PetscIntView(1,iterations,fd);CHKERRQ(ierr);

This is a type error (your compiler should have issued a warning), you want

PetscIntView(1,&iterations,fd);

because the prototype is PetscIntView(PetscInt,const PetscInt[],PetscViewer);

Also see Barry's comment about reading it correctly.

Jed