I've got a glade-constructed TreeView/ListStore that I'm trying to load into an application and manipulate via gtkmm.

Here's the manager's class:

```
typedef struct
{
  Gtk::ListStore *liststore_info;
  Gtk::TreeModelColumn<string> *treeview_info_column_time;
  Gtk::TreeModelColumn<string> *treeview_info_column_message;
}UiElements;

class GuiManager
{
  Glib::RefPtr<Gtk::Builder> builder;
  UiElements elements;

  public:
    GuiManager();
    ~GuiManager();

    void info_handler(string msg);
}

```

And the implementation:

```
GuiManager::GuiManager()
{
  builder = Gtk::Builder::create();
  builder->add_from_file("GUI.glade");

  builder->get_widget("liststore_info", elements.liststore_info);
  builder->get_widget("treeview_info_column_time", elements.treeview_info_column_time);
  builder->get_widget("treeview_info_column_message", elements.treeview_info_column_message);
}

```

Here's the function I'm trying to call to manipulate the TreeView:

```
void GuiManager::info_handler(string msg)
{
  Gtk::TreeModel::Row row = *(elements.liststore_info->append());
  row[*(elements.treeview_info_column_time)] = "Now";
  row[*(elements.treeview_info_column_message)] = msg;
}

```

And finally, the relevant Glade XML:

```
<object class="GtkListStore" id="liststore_info">
  <columns>
    <!-- column-name Time -->
    <column type="string"/>
    <!-- column-name Message -->
    <column type="string"/>
  </columns>
</object>
<object class="GtkTreeView" id="treeview_info">
  <property name="visible">True</property>
  <property name="can_focus">True</property>
  <property name="model">liststore_info</property>
  <property name="enable_search">False</property>
  <property name="enable_grid_lines">both</property>
  <child internal-child="selection">
    <object class="GtkTreeSelection" id="treeview-selection2"/>
  </child>
  <child>
    <object class="GtkTreeViewColumn" id="treeview_info_column_time">
      <property name="resizable">True</property>
      <property name="sizing">autosize</property>
      <property name="min_width">100</property>
      <property name="title" translatable="yes">Time</property>
      <property name="clickable">True</property>
    </object>
  </child>
  <child>
    <object class="GtkTreeViewColumn" id="treeview_info_column_message">
      <property name="resizable">True</property>
      <property name="sizing">autosize</property>
      <property name="min_width">300</property>
      <property name="title" translatable="yes">Message</property>
      <property name="clickable">True</property>
    </object>
  </child>
</object>

```

The compilation fails, however, with the following:

```
In file included from /usr/include/gtkmm-3.0/gtkmm.h:119:0,
                 from GUI3_gui_manager.h:8,
                 from GUI3_gui_manager.cpp:1:
/usr/include/gtkmm-3.0/gtkmm/builder.h: In instantiation of ‘void Gtk::Builder::get_widget(const Glib::ustring&, T_Widget*&) [with T_Widget = Gtk::TreeModelColumn<std::basic_string<char> >]’:
GUI3_gui_manager.cpp:64:86:   required from here
/usr/include/gtkmm-3.0/gtkmm/builder.h:628:93: error: ‘get_base_type’ is     not a member of ‘Gtk::TreeModelColumn<std::basic_string<char> >’
     widget = dynamic_cast<T_Widget*>(this->get_widget_checked(name, T_Widget::get_base_type()));
                                                                                             ^

```

I'm obviously misusing TreeModelColumn, but my [source tutorial](http://blog.mpshouse.com/?p=910) for this method (which as thus far proven reliable) does things in a similar fashion, so I'm at a loss for the correct method here.

Any help is appreciated. =)