Green Screen when setting up tuner as 'Single' (DiSEqC related?)

May be related to http://openpli.org/forums/topic/33333-why-are-there-only-32-lnb-numbers/ but I didn't want to rubbish that topic.

I got a GS when trying to set up a tuner with single satellite only. Log attached. It is my old DM8000 which I was trying to set up for my summertime home. The error part: 

Traceback (most recent call last):
  File "/usr/lib/enigma2/python/mytest.py", line 192, in processDelay
    callback(*retval)
  File "/usr/lib/enigma2/python/Screens/Satconfig.py", line 476, in handleKeyFileCallback
    self.newConfig()
  File "/usr/lib/enigma2/python/Screens/Satconfig.py", line 220, in newConfig
    self.createSetup()
  File "/usr/lib/enigma2/python/Screens/Satconfig.py", line 116, in createSetup
    self.createSimpleSetup(self.list, self.nimConfig.diseqcMode.value)
  File "/usr/lib/enigma2/python/Screens/Satconfig.py", line 25, in createSimpleSetup
    list.append(getConfigListEntry(_("Send DiSEqC"), nim.simpleSingleSendDiSEqC))
  File "/usr/lib/enigma2/python/Components/config.py", line 1577, in __getattr__
    return self.content.items[name]
KeyError: 'simpleSingleSendDiSEqC'
(PyObject_CallObject(<bound method Session.processDelay of <__main__.Session instance at 0x16d15f8>>,()) failed)

 Removing line 25 in /usr/lib/enigma2/python/Screens/Satconfig.py helped for me but I do not know if it was a right solution:

class NimSetup(Screen, ConfigListScreen, ServiceStopScreen):
        def createSimpleSetup(self, list, mode):
                nim = self.nimConfig
                if mode == "single":
                        list.append(getConfigListEntry(_("Satellite"), nim.diseqcA))
-                        list.append(getConfigListEntry(_("Send DiSEqC"), nim.simpleSingleSendDiSEqC))-
                else:
                        list.append(getConfigListEntry(_("Port A"), nim.diseqcA))

 Regards.