diff --git a/src/Mod/TechDraw/Gui/TaskDetail.cpp b/src/Mod/TechDraw/Gui/TaskDetail.cpp
index f7b1a6214f..6252627215 100644
--- a/src/Mod/TechDraw/Gui/TaskDetail.cpp
+++ b/src/Mod/TechDraw/Gui/TaskDetail.cpp
@@ -125,7 +125,7 @@ TaskDetail::TaskDetail(TechDraw::DrawViewPart* baseFeat):
             this, SLOT(onYEdit()));
     connect(ui->qsbRadius, SIGNAL(editingFinished()),
             this, SLOT(onRadiusEdit()));
-    connect(ui->aeReference, SIGNAL(editingFinished()),
+    connect(ui->leReference, SIGNAL(editingFinished()),
         this, SLOT(onReferenceEdit()));
 
     m_ghost = new QGIGhostHighlight();
@@ -198,7 +198,7 @@ TaskDetail::TaskDetail(TechDraw::DrawViewDetail* detailFeat):
             this, SLOT(onYEdit()));
     connect(ui->qsbRadius, SIGNAL(editingFinished()),
             this, SLOT(onRadiusEdit()));
-    connect(ui->aeReference, SIGNAL(editingFinished()),
+    connect(ui->leReference, SIGNAL(editingFinished()),
         this, SLOT(onReferenceEdit()));
 
     m_ghost = new QGIGhostHighlight();
@@ -280,7 +280,7 @@ void TaskDetail::setUiFromFeat()
     ui->qsbX->setValue(anchor.x);
     ui->qsbY->setValue(anchor.y);
     ui->qsbRadius->setValue(radius);
-    ui->aeReference->setText(ref);
+    ui->leReference->setText(ref);
 }
 
 //update ui point fields after tracker finishes
@@ -295,7 +295,7 @@ void TaskDetail::enableInputFields(bool b)
     ui->qsbX->setEnabled(b);
     ui->qsbY->setEnabled(b);
     ui->qsbRadius->setEnabled(b);
-    ui->aeReference->setEnabled(b);
+    ui->leReference->setEnabled(b);
 }
 
 void TaskDetail::onXEdit()
@@ -315,7 +315,7 @@ void TaskDetail::onRadiusEdit()
 
 void TaskDetail::onReferenceEdit()
 {
-    updateDetail();
+    updateDetail();   //<<<<<
 }
 
 void TaskDetail::onDraggerClicked(bool b)
@@ -430,23 +430,29 @@ void TaskDetail::createDetail()
 void TaskDetail::updateDetail()
 {
 //    Base::Console().Message("TD::updateDetail()\n");
-    Gui::Command::openCommand("Update Detail");
-    double x = ui->qsbX->rawValue();
-    double y = ui->qsbY->rawValue();
-    Base::Vector3d temp(x, y, 0.0);
-    TechDraw::DrawViewDetail* detailFeat = getDetailFeat();
-    detailFeat->AnchorPoint.setValue(temp);
+    try {
+        Gui::Command::openCommand("Update Detail");
+        double x = ui->qsbX->rawValue();
+        double y = ui->qsbY->rawValue();
+        Base::Vector3d temp(x, y, 0.0);
+        TechDraw::DrawViewDetail* detailFeat = getDetailFeat();
+        detailFeat->AnchorPoint.setValue(temp);
 
-    double radius = ui->qsbRadius->rawValue();
-    detailFeat->Radius.setValue(radius);
-    QString qRef = ui->aeReference->text();
-    std::string ref = Base::Tools::toStdString(qRef);
-    detailFeat->Reference.setValue(ref);
+        double radius = ui->qsbRadius->rawValue();
+        detailFeat->Radius.setValue(radius);
+        QString qRef = ui->leReference->text();
+        std::string ref = Base::Tools::toStdString(qRef);
+        detailFeat->Reference.setValue(ref);
 
-    detailFeat->recomputeFeature();
-    getBaseFeat()->requestPaint();
-    Gui::Command::updateActive();
-    Gui::Command::commitCommand();
+        detailFeat->recomputeFeature();
+        getBaseFeat()->requestPaint();
+        Gui::Command::updateActive();
+        Gui::Command::commitCommand();
+    }
+    catch (...) {
+        //this is probably due to appl closing while dialog is still open
+        Base::Console().Error("Task Detail - detail feature update failed.\n");
+    }
 }
 
 //***** Getters ****************************************************************
diff --git a/src/Mod/TechDraw/Gui/TaskDetail.ui b/src/Mod/TechDraw/Gui/TaskDetail.ui
index 0aa0a2fe21..6b17e707e1 100644
--- a/src/Mod/TechDraw/Gui/TaskDetail.ui
+++ b/src/Mod/TechDraw/Gui/TaskDetail.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>304</width>
-    <height>244</height>
+    <height>253</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -214,13 +214,7 @@
       </widget>
      </item>
      <item row="3" column="2">
-      <widget class="Gui::AccelLineEdit" name="aeReference">
-       <property name="toolTip">
-        <string>Detail identifier</string>
-       </property>
-       <property name="text">
-        <string>1</string>
-       </property>
+      <widget class="QLineEdit" name="leReference">
        <property name="alignment">
         <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
        </property>
@@ -231,11 +225,6 @@
   </layout>
  </widget>
  <customwidgets>
-  <customwidget>
-   <class>Gui::AccelLineEdit</class>
-   <extends>QLineEdit</extends>
-   <header>Gui/Widgets.h</header>
-  </customwidget>
   <customwidget>
    <class>Gui::QuantitySpinBox</class>
    <extends>QWidget</extends>
diff --git a/src/Mod/TechDraw/Gui/ViewProviderDrawingView.cpp b/src/Mod/TechDraw/Gui/ViewProviderDrawingView.cpp
index f083d784ff..2235daf354 100644
--- a/src/Mod/TechDraw/Gui/ViewProviderDrawingView.cpp
+++ b/src/Mod/TechDraw/Gui/ViewProviderDrawingView.cpp
@@ -184,13 +184,15 @@ QGIView* ViewProviderDrawingView::getQView(void)
         TechDraw::DrawView* dv = getViewObject();
         if (dv) {
             Gui::Document* guiDoc = Gui::Application::Instance->getDocument(getViewObject()->getDocument());
-            Gui::ViewProvider* vp = guiDoc->getViewProvider(getViewObject()->findParentPage());
-            ViewProviderPage* dvp = dynamic_cast<ViewProviderPage*>(vp);
-            if (dvp) {
-                if (dvp->getMDIViewPage()) {
-                    if (dvp->getMDIViewPage()->getQGVPage()) {
-                        qView = dynamic_cast<QGIView *>(dvp->getMDIViewPage()->
-                                               getQGVPage()->findQViewForDocObj(getViewObject()));
+            if (guiDoc != nullptr) {
+                Gui::ViewProvider* vp = guiDoc->getViewProvider(getViewObject()->findParentPage());
+                ViewProviderPage* dvp = dynamic_cast<ViewProviderPage*>(vp);
+                if (dvp) {
+                    if (dvp->getMDIViewPage()) {
+                        if (dvp->getMDIViewPage()->getQGVPage()) {
+                            qView = dynamic_cast<QGIView *>(dvp->getMDIViewPage()->
+                                                   getQGVPage()->findQViewForDocObj(getViewObject()));
+                        }
                     }
                 }
             }
@@ -249,10 +251,12 @@ MDIViewPage* ViewProviderDrawingView::getMDIViewPage() const
 {
     MDIViewPage* result = nullptr;
     Gui::Document* guiDoc = Gui::Application::Instance->getDocument(getViewObject()->getDocument());
-    Gui::ViewProvider* vp = guiDoc->getViewProvider(getViewObject()->findParentPage()); //if not in page.views, !@#$%
-    ViewProviderPage* dvp = dynamic_cast<ViewProviderPage*>(vp);
-    if (dvp) {
-        result = dvp->getMDIViewPage();
+    if (guiDoc != nullptr) {
+        Gui::ViewProvider* vp = guiDoc->getViewProvider(getViewObject()->findParentPage());
+        ViewProviderPage* dvp = dynamic_cast<ViewProviderPage*>(vp);
+        if (dvp) {
+            result = dvp->getMDIViewPage();
+        }
     }
     return result;
 }