I'm sorry, there is no such page as event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/month/all.
No other page links to event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/month/all yet.
Notice: 'event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/month/all': Bad page name: too long