diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/reports/SchedulingProgressPerOrderModel.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/reports/SchedulingProgressPerOrderModel.java
index bf2fee90a..4129a4cd7 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/reports/SchedulingProgressPerOrderModel.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/reports/SchedulingProgressPerOrderModel.java
@@ -104,10 +104,17 @@ public class SchedulingProgressPerOrderModel implements ISchedulingProgressPerOr
         for(OrderElement each: orderElements) {
             each.getCode();
             initializeDirectAdvanceAssignments(each.getDirectAdvanceAssignments());
+            initializeHoursGroups(each.getHoursGroups());
             initializeTasks(each.getTaskElements());
         }
     }
 
+    private void initializeHoursGroups(List<HoursGroup> hoursGroups) {
+        for (HoursGroup each : hoursGroups) {
+            each.getWorkingHours();
+        }
+    }
+
     private void initializeTasks(Set<TaskElement> tasks) {
         for(TaskElement each: tasks) {
             each.getName();