diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/orders/DetailsOrderElementController.java b/libreplan-webapp/src/main/java/org/libreplan/web/orders/DetailsOrderElementController.java
index 8945e1ecc..d94ba7829 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/orders/DetailsOrderElementController.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/orders/DetailsOrderElementController.java
@@ -72,7 +72,8 @@ public class DetailsOrderElementController extends
     }
 
     private boolean isSubcontracted() {
-        if (orderElementModel.getOrderElement() == null) {
+        if (orderElementModel.getOrderElement() == null
+                || orderElementModel.getOrderElement().getTaskSource() == null) {
             return false;
         }
         return orderElementModel.getOrderElement().getTaskSource().getTask()
diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/orders/OrderElementTreeController.java b/libreplan-webapp/src/main/java/org/libreplan/web/orders/OrderElementTreeController.java
index 45af8c565..f4d1d7f8e 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/orders/OrderElementTreeController.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/orders/OrderElementTreeController.java
@@ -484,8 +484,9 @@ public class OrderElementTreeController extends TreeController<OrderElement> {
                             currentOrderElement.setDeadline(value);
                         }
                     });
-            if (readOnly || currentOrderElement.getTaskSource().
-                    getTask().isSubcontracted()) {
+            if (readOnly
+                    || (currentOrderElement.getTaskSource() != null && currentOrderElement
+                            .getTaskSource().getTask().isSubcontracted())) {
                 dinamicDatebox.setDisabled(true);
             }
             addDateCell(dinamicDatebox, _("end"));