Index: sources/gui/qml/components/StackItem.qml
===================================================================
diff -u -r86e9dfbff50cb7e16fd94c16c1c818cef3b47eac -r3caffb866d4c84ac6282dcd36fc2d8f7cad9584d
--- sources/gui/qml/components/StackItem.qml	(.../StackItem.qml)	(revision 86e9dfbff50cb7e16fd94c16c1c818cef3b47eac)
+++ sources/gui/qml/components/StackItem.qml	(.../StackItem.qml)	(revision 3caffb866d4c84ac6282dcd36fc2d8f7cad9584d)
@@ -82,8 +82,9 @@
      * \brief   pushes the screen vScreen on the top of the stack
      */
     function push (vScreen) {
+        if ( vScreen    === undefined || vScreen    === null  ) return
         if ( _stackView.currentItem === vScreen) {
-            console.debug("same current screen didn't push" , vScreen.name)
+            console.debug("same current screen didn't push" , vScreen)
         }
         else {
             _stackView.push(vScreen)