Index: DamEngine/trunk/src/Deltares.DamEngine.Data/General/Dike.cs
===================================================================
diff -u -r3314 -r3345
--- DamEngine/trunk/src/Deltares.DamEngine.Data/General/Dike.cs	(.../Dike.cs)	(revision 3314)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/General/Dike.cs	(.../Dike.cs)	(revision 3345)
@@ -217,11 +217,29 @@
                     throw new DikeException("Location " + location.Name + " has no scenarios, at least one scenario is required.");
                 }
 
-                if (isOperational && location.Scenarios.Count > 1)
+                if (isOperational)
                 {
-                    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.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 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));
+                            }
+                        }
+                    }
                 }
+
+                
             }
         }