Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Sensors/SensorImportFromExcelSheet.cs
===================================================================
diff -u -r2089 -r2642
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Sensors/SensorImportFromExcelSheet.cs	(.../SensorImportFromExcelSheet.cs)	(revision 2089)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Sensors/SensorImportFromExcelSheet.cs	(.../SensorImportFromExcelSheet.cs)	(revision 2642)
@@ -223,9 +223,11 @@
                         Logger.LogWarning(string.Format("Error reading the value from column {0} for group id {1}",
                             sensorSelectionColumnName, id));
                     }
-
-                    groupIds = groupIdValue.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
-                    break;
+                    else
+                    {
+                        groupIds = groupIdValue.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
+                        break;
+                    }
                 }
 
                 if (groupIds == null)