Index: DamEngine/branches/DamEngine 19.2/src/Deltares.DamEngine.Data/General/Dike.cs
===================================================================
diff -u -r3344 -r3346
--- DamEngine/branches/DamEngine 19.2/src/Deltares.DamEngine.Data/General/Dike.cs	(.../Dike.cs)	(revision 3344)
+++ DamEngine/branches/DamEngine 19.2/src/Deltares.DamEngine.Data/General/Dike.cs	(.../Dike.cs)	(revision 3346)
@@ -214,36 +214,42 @@
 
                 if (isOperational)
                 {
-                    if (location.Scenarios.Count < 1)
-                    {
-                        throw new DikeException("Location " + location.Name +
-                                                " has no scenarios, at least one scenario is required.");
-                    }
+                    ValidateOperationalProject(location);
+                }
+            }
+        }
 
-                    if (location.Scenarios.Count > 1)
+        private static void ValidateOperationalProject(Location location)
+        {
+            if (location.Scenarios.Count < 1)
+            {
+                throw new DikeException("Location " + location.Name +
+                                        " has no scenarios, at least one scenario is required.");
+            }
+
+            if (location.Scenarios.Count > 1)
+            {
+                throw new DikeException(string.Format(
+                    "For Operational (DamLive), location {0} has {1} scenarios but only one is allowed!",
+                    location.Name, location.Scenarios.Count));
+            }
+
+            if (location.SensorLocation != null)
+            {
+                foreach (var sensor in location.SensorLocation.SensorGroup.SensorArray)
+                {
+                    if (sensor.RelativeLocation < 0)
                     {
                         throw new DikeException(string.Format(
-                            "For Operational (DamLive), location {0} has {1} scenarios but only one is allowed!",
-                            location.Name, location.Scenarios.Count));
+                            "For Operational (DamLive), location {0} has a sensor ({1}) which can not not be relative '+ " +
+                            "to the starting point (0) as its coordinate {2} is < 0 .",
+                            location.Name, sensor.Name, sensor.RelativeLocation));
                     }
-
-                    if (location.SensorLocation != null)
-                    {
-                        foreach (var sensorArray in location.SensorLocation.SensorGroup.SensorArray)
-                        {
-                            if (sensorArray.RelativeLocation < 0)
-                            {
-                                throw new DikeException(string.Format(
-                                    "For Operational (DamLive), location {0} has sensor which are not relative to the starting point.",
-                                    location.Name));
-                            }
-                        }
-                    }
                 }
             }
         }
 
-        
+
         /// <summary>
         /// Adapt data so it is consistent
         /// </summary>