"User Information: ===================Repeatedly using relationshionship calculator on the utilities section of the "Tools" menu.Error Details: ===================3092844: ERROR: _tool.py: line 271: Failed to start tool.Traceback (most recent call last):  File "C:\Program Files\gramps\PluginUtils\_Tool.py", line 267, in gui_tool    tool_class(dbstate, uistate, options_class, name, callback)  File "C:\Program Files\gramps\plugins\RelCalc.py", line 81, in __init__    ManagedWindow.ManagedWindow.__init__(self, uistate, [], self.__class__)  File "C:\Program Files\gramps\ManagedWindow.py", line 315, in __init__    uistate.gwm.get_item_from_id(window_key).present()  File "C:\Program Files\gramps\ManagedWindow.py", line 389, in present    assert self.window, "ManagedWindow: self.window does not exist!"AttributeError: RelCalc instance has no attribute 'window'System Information: ===================Python version: 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] BSDDB version: Gramps version: 2.2.7-1 LANG: OS: win32Distribution:  "