assertion error

error.txt

All dependencies seem to be present!
[jac@quetz prototype]$ python2 ./MapEditor.py 
from OverworldParts.Cell import *
from OverworldParts.Map import *
Map.G = MapEdit.G
Map.addTempCell = MapEdit.addTempCell
Map.as_8_bit = MapEdit.as_8_bit
Map.clearTempCells = MapEdit.clearTempCells
Map.colourBytesToNumber = MapEdit.colourBytesToNumber
Map.compile = MapEdit.compile
Map.createTempTerrainShader = MapEdit.createTempTerrainShader
Map.getLibForSave = MapEdit.getLibForSave
Map.getLibraryItems = MapEdit.getLibraryItems
Map.getObjectNodesForSave = MapEdit.getObjectNodesForSave
Map.load = MapEdit.load
Map.numberToColour = MapEdit.numberToColour
Map.save = MapEdit.save
Map.serlializedMatricesAndNodes = MapEdit.serlializedMatricesAndNodes
from OverworldParts.Matrix import *
from OverworldParts.NeighbourStorage import *
from OverworldParts.Node import *
from OverworldParts.Tileset import *
Traceback (most recent call last):
  File "./MapEditor.py", line 412, in <module>
    app.frame = MapEditorWindow(None, app, size=(1280,800))
  File "./MapEditor.py", line 234, in __init__
    self.menubar = ME_MenuBar(self)
  File "/dev/shm/3dpe/prototype/MapEditorParts/MenuItems.py", line 206, in __init__
    item.ready()
  File "/dev/shm/3dpe/prototype/MapEditorParts/MenuItems.py", line 107, in ready
    self.Enable(self.enabled)
  File "/usr/lib/python2.7/site-packages/wx-3.0-gtk2/wx/_core.py", line 12507, in Enable
    return _core_.MenuItem_Enable(*args, **kwargs)
wx._core.PyAssertionError: C++ assertion "m_menuItem" failed at ./src/gtk/menu.cpp(751) in Enable(): invalid menu item