gistfile1.diff

diff --git a/src/mat/impls/baij/seq/baij2.c b/src/mat/impls/baij/seq/baij2.c
index aa1ed44..ab8e5a5 100644
--- a/src/mat/impls/baij/seq/baij2.c
+++ b/src/mat/impls/baij/seq/baij2.c
@@ -2709,8 +2709,8 @@ PetscErrorCode MatZeroEntries_SeqBAIJ_Kernel(PetscInt thread_id,Mat A)
  PetscInt       n,start,end;
  Mat_SeqBAIJ     *a = (Mat_SeqBAIJ*)A->data;

-  start = trstarts[thread_id];
-  end   = trstarts[thread_id+1];
+  start = trstarts[thread_id]/A->rmap->bs;
+  end   = trstarts[thread_id+1]/A->rmap->bs;
  n     = a->i[end] - a->i[start];
  ierr  = PetscMemzero(a->a+a->bs2*a->i[start],a->bs2*n*sizeof(PetscScalar));CHKERRQ(ierr);
  return 0;