Error getting shared calendar invitations for entity types 3, Xcode 6.1.1. EKCalender, EKSource, EKEventstore and Objective C

I am developing calendar app. I am trying to save EKEvent using assigned EKCalender. But when I try to run following code it gives me error. Please help

-(BOOL)createEventWithTitle:(NSString *)paramTitle startDate:(NSDate *)paramStartDate endDate:(NSDate *)paramEndDate inCalendar:(EKCalendar *)paramCalendar inEventStore:(EKEventStore *)paramStore notes:(NSString *)paramNotes 
        {
         BOOL result = NO;

        //paramCalendar = [self.eventStoreiReportShifts defaultCalendarForNewEvents];
            if (self.eventsAccessGranted) {
                NSArray *caledars = [self.eventStore calendarsForEntityType:EKEntityTypeEvent];
                self.selectedCalendarEventKitIdentifier = [[NSUserDefaults standardUserDefaults] objectForKey:@"eventkit_cal_identifiers_string"];
                for(EKCalendar *aCal in caledars){
                    if([aCal.calendarIdentifier isEqualToString:self.selectedCalendarEventKitIdentifier]){
                        paramCalendar = [self.eventStore calendarWithIdentifier:[[NSUserDefaults standardUserDefaults] objectForKey:@"eventkit_cal_identifiers_string"]];
                    }
                }
                for (EKSource *source in self.eventStore.sources) {
                    if (source.sourceType == EKSourceTypeCalDAV) {
                        paramCalendar.source = source;
                        break;
                    } else if(source.sourceType == EKSourceTypeLocal){
                        paramCalendar.source = source;
                        break;
                    }
                }

        }else{
            return NO;
        }

        /* If a calendar does not allow modification of its contents
         then we can not insert an event into it */
        if (paramCalendar.allowsContentModifications == NO) {
            NSLog (@ "\n\n The selected calendar does not allow modifications.");
            return NO;
        }
        /* Create an event */

        EKEvent * event = [EKEvent eventWithEventStore:paramStore];

        event.calendar = paramCalendar;
        /* Set the properties of the event such as its title,
         start date / time, end date / time, etc. */
        event.title = paramTitle;
        event.notes = paramNotes;
        event.startDate = paramStartDate;
        event.endDate = paramEndDate;
        /* Finally, save the event into the calendar */
        NSError * saveError = nil;
        result = [paramStore saveEvent:event
                                  span:EKSpanThisEvent
                                 error:&saveError];
        if (result == NO) {
            NSLog (@ "\n\n An error occurred = %@", saveError);
        }
        return result;
    }

above code gives following error

    CalendarCalculations[1668:45103] 
    Error getting shared calendar invitations for entity types 3 from 
    daemon: Error Domain=EKCADErrorDomain Code=1013 
"The operation couldn’t be completed. (EKCADErrorDomain error 1013.)"

how can I get rid of it please?