diff -r 5a7bcf3b6a25 src/ksp/ksp/examples/tutorials/ex2.c
--- a/src/ksp/ksp/examples/tutorials/ex2.c	Thu Jan 26 23:31:23 2012 -0600
+++ b/src/ksp/ksp/examples/tutorials/ex2.c	Sat Jan 28 18:42:33 2012 +0100
@@ -56,26 +56,28 @@ int main(int argc,char **args)
      determined by PETSc at runtime.
 
      Performance tuning note:  For problems of substantial size,
      preallocation of matrix memory is crucial for attaining good 
      performance. See the matrix chapter of the users manual for details.
   */
   ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr);
   ierr = MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n);CHKERRQ(ierr);
-  ierr = MatSetFromOptions(A);CHKERRQ(ierr);
-  ierr = MatMPIAIJSetPreallocation(A,5,PETSC_NULL,5,PETSC_NULL);CHKERRQ(ierr);
-  ierr = MatSeqAIJSetPreallocation(A,5,PETSC_NULL);CHKERRQ(ierr);
+  //ierr = MatSetFromOptions(A);CHKERRQ(ierr);
+  //ierr = MatMPIAIJSetPreallocation(A,5,PETSC_NULL,5,PETSC_NULL);CHKERRQ(ierr);
+  //ierr = MatSeqAIJSetPreallocation(A,5,PETSC_NULL);CHKERRQ(ierr);
+  ierr = MatSetType(A,MATSEQDENSE);CHKERRQ(ierr);
 
   /* 
      Currently, all PETSc parallel matrix formats are partitioned by
      contiguous chunks of rows across the processors.  Determine which
      rows of the matrix are locally owned. 
   */
-  ierr = MatGetOwnershipRange(A,&Istart,&Iend);CHKERRQ(ierr);
+  //ierr = MatGetOwnershipRange(A,&Istart,&Iend);CHKERRQ(ierr);
+  Istart=0; Iend=m*n;
 
   /* 
      Set matrix elements for the 2-D, five-point stencil in parallel.
       - Each processor needs to insert only elements that it owns
         locally (but any non-local elements will be sent to the
         appropriate processor during matrix assembly). 
       - Always specify global rows and columns of matrix entries.