Eu estou tentando iterar através deste loop:

<code>for doc in coll.find()
</code>

Eu recebo o seguinte erro no registro 100.000 mais.

<code>File "build\bdist.win32\egg\pymongo\cursor.py", line 703, in next
File "build\bdist.win32\egg\pymongo\cursor.py", line 679, in _refresh
File "build\bdist.win32\egg\pymongo\cursor.py", line 628, in __send_message
File "build\bdist.win32\egg\pymongo\helpers.py", line 95, in _unpack_response
pymongo.errors.OperationFailure: cursor id '1236484850793' not valid at server
</code>

O que esse erro significa?