diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/reports/TimeLineRequiredMaterialModel.java b/libreplan-webapp/src/main/java/org/libreplan/web/reports/TimeLineRequiredMaterialModel.java
index f3fa22552..8d729ec15 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/reports/TimeLineRequiredMaterialModel.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/reports/TimeLineRequiredMaterialModel.java
@@ -203,6 +203,8 @@ public class TimeLineRequiredMaterialModel implements
         for (MaterialAssignment material : listMaterialAssignment) {
             OrderElement order = orderDAO.loadOrderAvoidingProxyFor(material
                     .getOrderElement());
+            // Load scheduling states
+            order.getSchedulingState();
 
             TaskElement task = findTaskBy(material);
             reloadTask(task);