diff --git a/src/epanet.c b/src/epanet.c
index fd92f6f..34e8d53 100755
--- a/src/epanet.c
+++ b/src/epanet.c
@@ -1095,7 +1095,7 @@ int DLLEXPORT ENgettimeparam(int code, long *value)
 {
    *value = 0;
    if (!Openflag) return(102);
-   if (code < EN_DURATION || code > EN_STARTTIME) return(251);
+   if (code < EN_DURATION || code > EN_NEXTEVENT) return(251);
    switch (code)
    {
       case EN_DURATION:     *value = Dur;       break;
@@ -1108,6 +1108,11 @@ int DLLEXPORT ENgettimeparam(int code, long *value)
       case EN_STATISTIC:    *value = Tstatflag; break;
       case EN_PERIODS:      *value = Nperiods;  break;
       case EN_STARTTIME:    *value = Tstart;    break;  /* Added TNT 10/2/2009 */
+      case EN_HTIME:        *value = Htime;     break;
+      case EN_NEXTEVENT:
+       *value = Hstep;     // find the lesser of the hydraulic time step length, or the time to next fill/empty
+       tanktimestep(value);
+       break;
    }
    return(0);
 }
@@ -1252,6 +1257,27 @@ int  DLLEXPORT ENgeterror(int errcode, char *errmsg, int n)
    else return(0);
 }
 
+int  DLLEXPORT ENgetstatistic(int code, int* value)
+/*----------------------------------------------------------------
+ **  Input:   code    = type of simulation statistic to retrieve
+ **  Output:  value   = value of requested statistic
+ **  Returns: error code
+ **  Purpose: retrieves hydraulic simulation statistic
+ **----------------------------------------------------------------
+ */
+{
+  switch (code) {
+    case EN_ITERATIONS:
+      *value = _iterations;
+      break;
+    case EN_RELATIVEERROR:
+      *value = _relativeError;
+      break;
+    default:
+      break;
+  }
+  return 0;
+}
 
 /*
 ----------------------------------------------------------------
@@ -1442,7 +1468,12 @@ int DLLEXPORT ENgetnodevalue(int index, int code, float *value)
          v = 0.0;
          if ( index > Njuncs ) v = Tank[index-Njuncs].Vmin * Ucf[VOLUME];
          break;
-         
+       
+     case EN_MAXVOLUME: // !sph
+       v = 0.0;
+       if ( index > Njuncs ) v = Tank[index-Njuncs].Vmax * Ucf[VOLUME];
+       break;
+       
       case EN_VOLCURVE:
          v = 0.0;
          if ( index > Njuncs ) v = Tank[index-Njuncs].Vcurve;
@@ -2298,7 +2329,12 @@ int  DLLEXPORT  ENsettimeparam(int code, long value)
 */
 {
    if (!Openflag) return(102);
-   if (OpenHflag || OpenQflag) return(109);
+  if (OpenHflag || OpenQflag) { 
+    // --> there's nothing wrong with changing certain time parameters during a simulation run
+    if (code != EN_DURATION) {
+      return(109);
+    }
+  }
    if (value < 0) return(202);
    switch(code)
    {
@@ -2335,6 +2371,8 @@ int  DLLEXPORT  ENsettimeparam(int code, long value)
       case EN_STATISTIC:     if (value > RANGE) return(202);
                              Tstatflag = (char)value;
                              break;
+      case EN_HTIME:         Htime = value;
+                             break;
       default:               return(251);
    }
    return(0);
@@ -2567,7 +2605,7 @@ int  openhydfile()
       nsize[2] = Ntanks;
       nsize[3] = Npumps;
       nsize[4] = Nvalves;
-      nsize[5] = Dur;
+      nsize[5] = (int)Dur;
       fwrite(&magic,sizeof(INT4),1,HydFile);
       fwrite(&version,sizeof(INT4),1,HydFile);
       fwrite(nsize,sizeof(INT4),6,HydFile);
diff --git a/src/hydraul.c b/src/hydraul.c
index 53b77f4..a56e14a 100755
--- a/src/hydraul.c
+++ b/src/hydraul.c
@@ -204,6 +204,10 @@ int   runhyd(long *t)
       /* Report new status & save results */
       if (Statflag) writehydstat(iter,relerr);
 
+     /* solution info */
+     _relativeError = relerr;
+     _iterations = iter;
+     
 /*** Updated 3/1/01 ***/
       /* If system unbalanced and no extra trials */
       /* allowed, then activate the Haltflag.     */
diff --git a/src/toolkit.h b/src/toolkit.h
index 1c56c47..016a31f 100755
--- a/src/toolkit.h
+++ b/src/toolkit.h
@@ -61,8 +61,8 @@ AUTHOR:     L. Rossman
 #define EN_MAXLEVEL     21
 #define EN_MIXFRACTION  22
 #define EN_TANK_KBULK   23
-
-#define EN_TANKVOLUME   24     /* TNT */
+#define EN_TANKVOLUME   24
+#define EN_MAXVOLUME    25
 
 #define EN_DIAMETER     0    /* Link parameters */
 #define EN_LENGTH       1
@@ -91,6 +91,12 @@ AUTHOR:     L. Rossman
 #define EN_STATISTIC    8
 #define EN_PERIODS      9
 #define EN_STARTTIME    10  /* Added TNT 10/2/2009 */
+#define EN_HTIME        11
+#define EN_HALTFLAG     12
+#define EN_NEXTEVENT    13
+
+#define EN_ITERATIONS     0
+#define EN_RELATIVEERROR  1
 
 #define EN_NODECOUNT    0   /* Component counts */
 #define EN_TANKCOUNT    1
@@ -206,6 +212,7 @@ extern "C" {
  int  DLLEXPORT ENgetpatternvalue(int, int, float *);
  int  DLLEXPORT ENgetqualtype(int *, int *);
  int  DLLEXPORT ENgeterror(int, char *, int);
+ int  DLLEXPORT ENgetstatistic(int code, int* value);
 
  int  DLLEXPORT ENgetnodeindex(char *, int *);
  int  DLLEXPORT ENgetnodeid(int, char *);
diff --git a/src/vars.h b/src/vars.h
index ebd91c1..b8b821b 100755
--- a/src/vars.h
+++ b/src/vars.h
@@ -158,6 +158,7 @@ EXTERN Svalve   *Valve;                /* Valve data                   */
 EXTERN Scontrol *Control;              /* Control data                 */
 EXTERN HTtable  *Nht, *Lht;            /* Hash tables for ID labels    */
 EXTERN Padjlist *Adjlist;              /* Node adjacency lists         */
+EXTERN int _relativeError, _iterations; /* Info about hydraulic solution */
 
 /*
 ** NOTE: Hydraulic analysis of the pipe network at a given point in time