diff --git a/wrk.patch b/wrk.patch
index 43bad46..0484dc7 100644
--- a/wrk.patch
+++ b/wrk.patch
@@ -1,6 +1,6 @@
 diff -up wrk/ode-initval2/msbdf.c.wrk wrk/ode-initval2/msbdf.c
 --- wrk/ode-initval2/msbdf.c.wrk	2013-01-09 10:35:45.259960403 +0100
-+++ wrk/ode-initval2/msbdf.c	2013-01-17 16:52:13.135771518 +0100
++++ wrk/ode-initval2/msbdf.c	2013-01-17 17:00:39.904038985 +0100
 @@ -43,6 +43,8 @@
     framework.
  */
@@ -39,7 +39,7 @@ diff -up wrk/ode-initval2/msbdf.c.wrk wrk/ode-initval2/msbdf.c
  {
    /* Carries out a step by BDF linear multistep methods. */
 -
-+PD(h);
++//PD(h);
    msbdf_state_t *state = (msbdf_state_t *) vstate;
  
    double *const z = state->z;
@@ -57,7 +57,7 @@ diff -up wrk/ode-initval2/msbdf.c.wrk wrk/ode-initval2/msbdf.c
  
 diff -up wrk/ode-initval2/test.c.wrk wrk/ode-initval2/test.c
 --- wrk/ode-initval2/test.c.wrk	2013-01-09 10:48:22.051415928 +0100
-+++ wrk/ode-initval2/test.c	2013-01-17 15:18:46.759826995 +0100
++++ wrk/ode-initval2/test.c	2013-01-17 17:12:50.880664280 +0100
 @@ -923,6 +923,18 @@ rhs_ringmod (double t, const double y[],
    f[13] = (-y[0] + uin1 - (ri + rg1) * y[13]) / ls1;
    f[14] = (-y[1] - (rc + rg1) * y[14]) / ls1;
@@ -77,16 +77,29 @@ diff -up wrk/ode-initval2/test.c.wrk wrk/ode-initval2/test.c
    return GSL_SUCCESS;
  }
  
-@@ -1264,10 +1276,19 @@ sys_driver (const gsl_odeiv2_step_type *
+@@ -1239,6 +1251,8 @@ test_evolve_system (const gsl_odeiv2_ste
+   gsl_odeiv2_driver_free (d);
+ }
+ 
++#define PD(fl) printf("%lu\n", *((unsigned long *)&(fl)))
++
+ int
+ sys_driver (const gsl_odeiv2_step_type * T,
+             const gsl_odeiv2_system * sys,
+@@ -1264,10 +1278,23 @@ sys_driver (const gsl_odeiv2_step_type *
    nfe = 0;
    nje = 0;
    
 +  int poc=0;
    while (t < t1)
      {
++	    printf("pred\n");
++	    PD(h);
        s = gsl_odeiv2_evolve_apply (d->e, d->c, d->s, sys, &t, t1, &h, y);
  
 +      printf("\nkrok %d\n", ++poc);
++printf("po\n");
++PD(h);
 +/*      int k;
 +      for (k=0; k<15; ++k) {
 +	printf(" %lu\n",(*(unsigned long int *)(&(y[k]))));
@@ -97,7 +110,7 @@ diff -up wrk/ode-initval2/test.c.wrk wrk/ode-initval2/test.c
  #ifdef DEBUG
        printf ("%.5e %.5e %.5e %d\n", t, y[0], y[1],
                gsl_odeiv2_step_order (d->s));
-@@ -1959,7 +1980,7 @@ test_extreme_problems (void)
+@@ -1959,7 +1986,7 @@ test_extreme_problems (void)
  
    /* Loop over problems */
  
@@ -106,7 +119,7 @@ diff -up wrk/ode-initval2/test.c.wrk wrk/ode-initval2/test.c
      {
        /* Initialize */
  
-@@ -2001,12 +2022,13 @@ test_extreme_problems (void)
+@@ -2001,12 +2028,13 @@ test_extreme_problems (void)
  
        /* Call each solver for the problem */
  
@@ -122,7 +135,7 @@ diff -up wrk/ode-initval2/test.c.wrk wrk/ode-initval2/test.c
            if (s != GSL_SUCCESS)
              {
                printf ("start=%.5e, initstepsize=%.5e\n", start[p],
-@@ -2450,7 +2472,7 @@ main (void)
+@@ -2450,7 +2478,7 @@ main (void)
  
    /* Basic tests for all steppers */
  
@@ -131,7 +144,7 @@ diff -up wrk/ode-initval2/test.c.wrk wrk/ode-initval2/test.c
      {
        test_stepper (p[i].type);
      }
-@@ -2469,9 +2491,9 @@ main (void)
+@@ -2469,9 +2497,9 @@ main (void)
        test_stepsize_fail (p[i].type, p[i].h);
        test_user_break (p[i].type, p[i].h);
      }
@@ -143,7 +156,7 @@ diff -up wrk/ode-initval2/test.c.wrk wrk/ode-initval2/test.c
    explicit_stepper[0].type = gsl_odeiv2_step_rk4;
    explicit_stepper[0].h = 1.0e-3;
    explicit_stepper[1].type = gsl_odeiv2_step_rk2;
-@@ -2491,16 +2513,16 @@ main (void)
+@@ -2491,16 +2519,16 @@ main (void)
        test_stepfn (explicit_stepper[i].type);
        test_stepfn2 (explicit_stepper[i].type);
      }