Traceback (most recent call last):
  File "/var/lib/python-support/python2.5/conduit/MainWindow.py", line 486, in drag_data_received_data
    self.canvas.add_dataprovider_to_canvas(dataproviderKey, new, x, y)
  File "/var/lib/python-support/python2.5/conduit/Canvas.py", line 371, in add_dataprovider_to_canvas
    self._connect_dataprovider_signals(dataproviderWrapper)
  File "/var/lib/python-support/python2.5/conduit/Canvas.py", line 75, in _connect_dataprovider_signals
    view.connect("button-press-event",  self.on_dataprovider_button_press, dataproviderWrapper)
AttributeError: 'NoneType' object has no attribute 'connect'