EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000002 on UITableView reloadData - ios

Question

I've had this problem for a while and it's driving me nuts. This is reported by Crashlytics but only for a few users. I'm unable to recreate the problem myself.
I'm using a SplitViewController and this occurs after a user adds data within a UIViewController and touch the save button, which then returns to the SplitViewController to perform the method 'saveItemEntry' shown below.
I've tried a suggestion from a previous post which was to wrap the [self.tableView reloadData] with dispatch_async(dispatch_get_main_queue(), ^(void), but that actually made it worse. It isn't like the data takes ages to load, it doesn't, so I can't see that multi-tasking will help, but I'm open to advice on whether I should be doing that.
I'm really not clear on how to interperupt the crash info. If someone can and can suggest what might be causing this that would be awesome.
If more info is needed please let me know.
Here's the crash details:
Here's the Raw stuff..
Thread : Crashed: com.apple.main-thread
0 libobjc.A.dylib 0x20407ae2 objc_msgSend + 1
1 CoreFoundation 0x20b8391b -[NSDictionary descriptionWithLocale:indent:] + 310
2 Foundation 0x2136fe2d _NSDescriptionWithLocaleFunc + 60
3 CoreFoundation 0x20c011a3 __CFStringAppendFormatCore + 7986
4 CoreFoundation 0x20bff255 _CFStringCreateWithFormatAndArgumentsAux2 + 80
5 CoreFoundation 0x20c17559 _CFLogvEx2 + 96
6 CoreFoundation 0x20c179af _CFLogvEx3 + 118
7 Foundation 0x214374f7 _NSLogv + 126
8 Foundation 0x2137e79d NSLog + 28
9 UIKit 0x24eac5fb -[UITableView reloadData] + 1818
10 Simple Meeting Minutes 0xfb859 -[MMDetailTableVC saveItemEntry:] (MMDetailTableVC.m:1423)
11 Simple Meeting Minutes 0x10becf -[MMItemViewController saveButtonAction:] (MMItemViewController.m:526)
12 UIKit 0x24dfd771 -[UIApplication sendAction:to:from:forEvent:] + 80
13 UIKit 0x24f7ec71 -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 140
14 UIKit 0x24dfd771 -[UIApplication sendAction:to:from:forEvent:] + 80
15 UIKit 0x24dfd701 -[UIControl sendAction:to:forEvent:] + 64
16 UIKit 0x24de561f -[UIControl _sendActionsForEvents:withEvent:] + 446
17 UIKit 0x24de574b -[UIControl _sendActionsForEvents:withEvent:] + 746
18 UIKit 0x24dfd051 -[UIControl touchesEnded:withEvent:] + 616
19 UIKit 0x24dfccbf -[UIWindow _sendTouchesForEvent:] + 646
20 UIKit 0x24df55d7 -[UIWindow sendEvent:] + 642
21 UIKit 0x24dc6119 -[UIApplication sendEvent:] + 204
22 UIKit 0x24dc4757 _UIApplicationHandleEventQueue + 5134
23 CoreFoundation 0x20bf1257 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 14
24 CoreFoundation 0x20bf0e47 __CFRunLoopDoSources0 + 454
25 CoreFoundation 0x20bef1af __CFRunLoopRun + 806
26 CoreFoundation 0x20b41bb9 CFRunLoopRunSpecific + 516
27 CoreFoundation 0x20b419ad CFRunLoopRunInMode + 108
28 GraphicsServices 0x21dbbaf9 GSEventRunModal + 160
29 UIKit 0x24e2dfb5 UIApplicationMain + 144
30 Simple Meeting Minutes 0xf5d6f main (main.m:16)
31 libdispatch.dylib 0x207f4873 (Missing)
and here's my code in this particular area..
- (void)saveItemEntry:(MMitem *)item{
if (item)
{
// save item to the sqlite3 database file
NSString *resultStr = [self.meetingModel saveItem:item];
if ([resultStr isEqualToString:#"OK"])
{
// all good so close form and refresh data
[self dismissViewControllerAnimated:NO completion:nil];
[self.tableView reloadData];
// or if there is an error result then display message
}
else if ([resultStr isEqualToString:#"DescriptionNotesMissing"])
{
[self showAlert:#"Missing Description or Notes" :#"An Item Description or Notes is required" :0];
[self.itemViewController.itemDescription becomeFirstResponder];
}
// for any other error do nothing
}
}