--- rpl/lapack/lapack/dsytrf_rook.f	2014/01/27 09:28:28	1.2
+++ rpl/lapack/lapack/dsytrf_rook.f	2016/08/27 15:27:11	1.3
@@ -208,7 +208,7 @@
 *  =====================================================================
       SUBROUTINE DSYTRF_ROOK( UPLO, N, A, LDA, IPIV, WORK, LWORK, INFO )
 *
-*  -- LAPACK computational routine (version 3.4.1) --
+*  -- LAPACK computational routine (version 3.6.1) --
 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
 *     April 2012
@@ -261,7 +261,7 @@
 *        Determine the block size
 *
          NB = ILAENV( 1, 'DSYTRF_ROOK', UPLO, N, -1, -1, -1 )
-         LWKOPT = N*NB
+         LWKOPT = MAX( 1, N*NB )
          WORK( 1 ) = LWKOPT
       END IF
 *