diff --git a/include/epanet2.pas b/include/epanet2.pas
index 3c5345d..e744744 100644
--- a/include/epanet2.pas
+++ b/include/epanet2.pas
@@ -3,7 +3,7 @@ unit epanet2;
 { Declarations of imported procedures from the EPANET PROGRAMMERs TOOLKIT }
 { (EPANET2.DLL) }
 
-{Last updated on 10/29/19}
+{Last updated on 11/02/19}
 
 interface
 
@@ -355,7 +355,7 @@ const
 
  function  ENgetvertexcount(Index: Integer; var Count: Integer): Integer; stdcall; external EpanetLib;
  function  ENgetvertex(Index: Integer; Vertex: Integer; var X: Double; var Y: Double): Integer; stdcall; external EpanetLib;
- function  ENsetvertices(Index: Integer; X: array of Double; Y: array of Double; Count: Integer): Integer; stdcall; external EpanetLib;
+ function  ENsetvertices(Index: Integer; var X: Double; var Y: Double; Count: Integer): Integer; stdcall; external EpanetLib;
  
 {Pump Functions}
  function  ENgetpumptype(LinkIndex: Integer; var PumpType: Integer): Integer; stdcall; external EpanetLib;
@@ -372,7 +372,7 @@ const
  function  ENgetpatternvalue(Index: Integer; Period: Integer; var Value: Single): Integer; stdcall; external EpanetLib;
  function  ENsetpatternvalue(Index: Integer; Period: Integer; Value: Single): Integer; stdcall; external EpanetLib;
  function  ENgetaveragepatternvalue(Index: Integer; var Value: Single): Integer; stdcall; external EpanetLib;
- function  ENsetpattern(Index: Integer; F: array of Single; N: Integer): Integer; stdcall; external EpanetLib;
+ function  ENsetpattern(Index: Integer; var F: Single; N: Integer): Integer; stdcall; external EpanetLib;
            
 {Curve Functions}
  function  ENaddcurve(ID: PAnsiChar): Integer; stdcall; external EpanetLib;
@@ -384,8 +384,8 @@ const
  function  ENgetcurvetype(Index: Integer; var CurveType: Integer): Integer; stdcall; external EpanetLib;
  function  ENgetcurvevalue(CurveIndex: Integer; PointIndex: Integer; var X: Single; var Y: Single): Integer; stdcall; external EpanetLib;
  function  ENsetcurvevalue(CurveIndex: Integer; PointIndex: Integer; X: Single; Y: Single): Integer; stdcall; external EpanetLib;
- function  ENgetcurve(Index: Integer; ID: PAnsiChar; var N: Integer; var X: array of Single; var Y: array of Single): Integer; stdcall; external EpanetLib;
- function  ENsetcurve(Index: Integer; X: array of Single; Y: array of Single; N: Integer): Integer; stdcall; external EpanetLib;
+ function  ENgetcurve(Index: Integer; ID: PAnsiChar; var N: Integer; var X: Single; var Y: Single): Integer; stdcall; external EpanetLib;
+ function  ENsetcurve(Index: Integer; var X: Single; var Y: Single; N: Integer): Integer; stdcall; external EpanetLib;
 
 {Control Functions}
  function  ENaddcontrol(Ctype: Integer; Link: Integer; Setting: Single; Node: Integer; Level: Single; var Index: Integer): Integer; stdcall; external EpanetLib;
diff --git a/src/epanet.c b/src/epanet.c
index 434c6dc..4ba3c90 100644
--- a/src/epanet.c
+++ b/src/epanet.c
@@ -7,7 +7,7 @@
  Authors:      see AUTHORS
  Copyright:    see AUTHORS
  License:      see LICENSE
- Last Updated: 10/29/2019
+ Last Updated: 11/02/2019
  ******************************************************************************
 */
 
@@ -4474,7 +4474,8 @@ int DLLEXPORT EN_setpattern(EN_Project p, int index, double *values, int len)
     // Check for valid arguments
     if (!p->Openflag) return 102;
     if (index <= 0 || index > net->Npats) return 205;
-    if (len <= 0) return 251;
+    if (values == NULL) return 205;
+    if (len <= 0) return 202;
 
     // Re-set number of time periods & reallocate memory for multipliers
     Pattern[index].Length = len;
@@ -4741,7 +4742,9 @@ int DLLEXPORT EN_setcurvevalue(EN_Project p, int curveIndex, int pointIndex,
     // Insert new point into curve
     curve->X[n] = x;
     curve->Y[n] = y;
-    return 0;
+    
+    // Adjust parameters for pumps using curve as a head curve
+    return adjustpumpparams(p, curveIndex);
 }
 
 int DLLEXPORT EN_getcurve(EN_Project p, int index, char *id, int *nPoints,
@@ -4765,6 +4768,7 @@ int DLLEXPORT EN_getcurve(EN_Project p, int index, char *id, int *nPoints,
 
     if (!p->Openflag) return 102;
     if (index <= 0 || index > p->network.Ncurves) return 206;
+    if (xValues == NULL || yValues == NULL) return 206;
     curve = &p->network.Curve[index];
     strncpy(id, curve->ID, MAXID);
     *nPoints = curve->Npts;
@@ -4795,6 +4799,7 @@ int DLLEXPORT EN_setcurve(EN_Project p, int index, double *xValues,
     // Check for valid arguments
     if (!p->Openflag) return 102;
     if (index <= 0 || index > net->Ncurves) return 206;
+    if (xValues == NULL || yValues == NULL) return 206;
     if (nPoints <= 0) return 202;
 
     // Check that x values are increasing
@@ -4811,7 +4816,9 @@ int DLLEXPORT EN_setcurve(EN_Project p, int index, double *xValues,
         curve->X[j] = xValues[j];
         curve->Y[j] = yValues[j];
     }
-    return 0;
+    
+    // Adjust parameters for pumps using curve as a head curve
+    return adjustpumpparams(p, index);
 }
 
 /********************************************************************
diff --git a/src/epanet2.c b/src/epanet2.c
index 2226277..f5940cd 100644
--- a/src/epanet2.c
+++ b/src/epanet2.c
@@ -7,7 +7,7 @@
  Authors:      see AUTHORS
  Copyright:    see AUTHORS
  License:      see LICENSE
- Last Updated: 10/29/2019
+ Last Updated: 11/02/2019
  ******************************************************************************
 */
 
@@ -609,6 +609,7 @@ int DLLEXPORT ENsetpattern(int index, EN_API_FLOAT_TYPE *values, int len)
 {
     double *v = NULL;
     int i, errcode;
+    if (values == NULL) return 206;
     v = (double *)calloc(len, sizeof(double));
     if (v)
     {
@@ -685,6 +686,7 @@ int DLLEXPORT ENgetcurve(int index, char *id, int *nPoints,
     Scurve *curve;
 
     if (index <= 0 || index > net->Ncurves) return 206;
+    if (xValues == NULL || yValues == NULL) return 206;
     curve = &net->Curve[index];
     strncpy(id, curve->ID, MAXID);
     *nPoints = curve->Npts;
@@ -701,7 +703,11 @@ int DLLEXPORT ENsetcurve(int index, EN_API_FLOAT_TYPE *xValues,
 {
     double *xx = NULL;
     double *yy = NULL;
-    int i, errcode;
+    int i, errcode = 0;
+    
+    if (xValues == NULL || yValues == NULL) return 206;
+    if (nPoints < 1) return 202;
+    
     xx = (double *)calloc(nPoints, sizeof(double));
     yy = (double *)calloc(nPoints, sizeof(double));
     if (xx && yy)
diff --git a/src/funcs.h b/src/funcs.h
index ff2303f..3eb6dcc 100755
--- a/src/funcs.h
+++ b/src/funcs.h
@@ -7,7 +7,7 @@
  Authors:      see AUTHORS
  Copyright:    see AUTHORS
  License:      see LICENSE
- Last Updated: 10/29/2019
+ Last Updated: 11/02/2019
  ******************************************************************************
 */
 #ifndef FUNCS_H
@@ -46,6 +46,7 @@ void    freelinkvertices(Slink *);
 
 void    adjustpatterns(Network *, int);
 void    adjustcurves(Network *, int);
+int     adjustpumpparams(Project *, int);
 int     resizecurve(Scurve *, int);
 
 int     getcomment(Network *, int, int, char *);
diff --git a/src/project.c b/src/project.c
index e04459c..99dfe57 100644
--- a/src/project.c
+++ b/src/project.c
@@ -7,13 +7,14 @@
  Authors:      see AUTHORS
  Copyright:    see AUTHORS
  License:      see LICENSE
- Last Updated: 10/29/2019
+ Last Updated: 11/02/2019
  ******************************************************************************
 */
 
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <math.h> 
 
 //*** For the Windows SDK _tempnam function ***//
 #ifdef _WIN32
@@ -998,6 +999,48 @@ void adjustcurves(Network *network, int index)
     }
 }
 
+int adjustpumpparams(Project *pr, int curveIndex)
+/*----------------------------------------------------------------
+**  Input:   curveIndex = index of a data curve
+**  Output:  returns an error code
+**  Purpose: updates head curve parameters for pumps using a 
+**           curve whose data have been modified.
+**----------------------------------------------------------------
+*/
+{
+    Network *network = &pr->network;
+
+    double *Ucf = pr->Ucf;
+    int j, err = 0;
+    Spump *pump;
+    
+    // Check each pump
+    for (j = 1; j <= network->Npumps; j++)
+    {
+        // Pump uses curve as head curve
+        pump = &network->Pump[j];
+        if ( curveIndex == pump->Hcurve)
+        {
+            // Update its head curve parameters
+            pump->Ptype = NOCURVE;
+            err = updatepumpparams(pr, curveIndex);
+            if (err > 0) break;
+            
+            // Convert parameters to internal units
+            if (pump->Ptype == POWER_FUNC)
+            {
+                pump->H0 /= Ucf[HEAD];
+                pump->R *= (pow(Ucf[FLOW], pump->N) / Ucf[HEAD]);
+            }
+            pump->Q0 /= Ucf[FLOW];
+            pump->Qmax /= Ucf[FLOW];
+            pump->Hmax /= Ucf[HEAD];
+        }
+    }
+    return err;
+}
+        
+
 int resizecurve(Scurve *curve, int size)
 /*----------------------------------------------------------------
 **  Input:   curve = a data curve object