title: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM itemName]: unrecognized selector sent to instance
body: <p>This is my code for loading data from sqlite file</p>
  
  <pre><code>- (void) loadInitialData{
  
      // Form the query.
      NSString *query = @"select * from tasklist";
  
      // Get the results.
      if (self.toDoItems != nil) {
          self.toDoItems = nil;
      }
  
  
      NSArray *dbResultArray = [[NSArray alloc] initWithArray:[self.dbManager loadDataFromDB:query]];
  
      //Logging for debug purpose
      NSLog(@"Result set starts");
  
      for(NSArray *subArray in dbResultArray) {
          NSLog(@"Data in array: %@",subArray);
      }
  
      NSLog(@"Result set ends");
  
      self.toDoItems = [[NSMutableArray alloc]initWithArray:dbResultArray];
  
      // Reload the table view.
      //[self.tblPeople reloadData];
      [self.tableView reloadData];
  }
  
  - (void)viewDidLoad
  {
      [super viewDidLoad];
  
      self.dbManager = [[DBManager alloc] initWithDatabaseFilename:@"todotaskdb.sql"];
  
      self.toDoItems = [[NSMutableArray alloc] init];
      [self loadInitialData];
  }
  </code></pre>
  
  <p>And I am getting this error using NSLog</p>
  
  <pre><code>2014-11-25 18:24:13.862 ToDoList[3213:60b] Result set ends
  2014-11-25 18:24:13.865 ToDoList[3213:60b] -[__NSArrayM itemName]: unrecognized selector sent to instance 0x8c996f0
  2014-11-25 18:24:13.900 ToDoList[3213:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM itemName]: unrecognized selector sent to instance 0x8c996f0'
  *** First throw call stack:
  (
      0   CoreFoundation                      0x018dc1e4 __exceptionPreprocess + 180
      1   libobjc.A.dylib                     0x0165b8e5 objc_exception_throw + 44
      2   CoreFoundation                      0x01979243 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
      3   CoreFoundation                      0x018cc50b ___forwarding___ + 1019
      4   CoreFoundation                      0x018cc0ee _CF_forwarding_prep_0 + 14
      5   ToDoList                            0x00004882 -[XYZToDoListTableViewController tableView:cellForRowAtIndexPath:] + 306
      6   UIKit                               0x0041411f -[UITableView _createPreparedCellForGlobalRow:withIndexPath:] + 412
      7   UIKit                               0x004141f3 -[UITableView _createPreparedCellForGlobalRow:] + 69
      8   UIKit                               0x003f5ece -[UITableView _updateVisibleCellsNow:] + 2428
      9   UIKit                               0x0040a6a5 -[UITableView layoutSubviews] + 213
      10  UIKit                               0x0038a964 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 355
      11  libobjc.A.dylib                     0x0166d82b -[NSObject performSelector:withObject:] + 70
      12  QuartzCore                          0x03d4745a -[CALayer layoutSublayers] + 148
      13  QuartzCore                          0x03d3b244 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
      14  QuartzCore                          0x03d473a5 -[CALayer layoutIfNeeded] + 160
      15  UIKit                               0x0044cae3 -[UIViewController window:setupWithInterfaceOrientation:] + 304
      16  UIKit                               0x00362aa7 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:isRotating:] + 5212
      17  UIKit                               0x00361646 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:] + 82
      18  UIKit                               0x00361518 -[UIWindow _setRotatableViewOrientation:updateStatusBar:duration:force:] + 117
      19  UIKit                               0x003615a0 -[UIWindow _setRotatableViewOrientation:duration:force:] + 67
      20  UIKit                               0x0036063a __57-[UIWindow _updateToInterfaceOrientation:duration:force:]_block_invoke + 120
      21  UIKit                               0x0036059c -[UIWindow _updateToInterfaceOrientation:duration:force:] + 400
      22  UIKit                               0x003612f3 -[UIWindow setAutorotates:forceUpdateInterfaceOrientation:] + 870
      23  UIKit                               0x003648e6 -[UIWindow setDelegate:] + 449
      24  UIKit                               0x0043eb77 -[UIViewController _tryBecomeRootViewControllerInWindow:] + 180
      25  UIKit                               0x0035a474 -[UIWindow addRootViewControllerViewIfPossible] + 591
      26  UIKit                               0x0035a5ef -[UIWindow _setHidden:forced:] + 312
      27  UIKit                               0x0035a86b -[UIWindow _orderFrontWithoutMakingKey] + 49
      28  UIKit                               0x003653c8 -[UIWindow makeKeyAndVisible] + 65
      29  UIKit                               0x00315bc0 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 2097
      30  UIKit                               0x0031a667 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 824
      31  UIKit                               0x0032ef92 -[UIApplication handleEvent:withNewEvent:] + 3517
      32  UIKit                               0x0032f555 -[UIApplication sendEvent:] + 85
      33  UIKit                               0x0031c250 _UIApplicationHandleEvent + 683
      34  GraphicsServices                    0x038d1f02 _PurpleEventCallback + 776
      35  GraphicsServices                    0x038d1a0d PurpleEventCallback + 46
      36  CoreFoundation                      0x01857ca5 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
      37  CoreFoundation                      0x018579db __CFRunLoopDoSource1 + 523
      38  CoreFoundation                      0x0188268c __CFRunLoopRun + 2156
      39  CoreFoundation                      0x018819d3 CFRunLoopRunSpecific + 467
      40  CoreFoundation                      0x018817eb CFRunLoopRunInMode + 123
      41  UIKit                               0x00319d9c -[UIApplication _run] + 840
      42  UIKit                               0x0031bf9b UIApplicationMain + 1225
      43  ToDoList                            0x00004e0d main + 141
      44  libdyld.dylib                       0x01e25701 start + 1
  )
  libc++abi.dylib: terminating with uncaught exception of type NSException
  </code></pre>
  
  <p>Ironically, if put below line at the end of viewDidLoad method, then it works.</p>
  
  <pre><code>self.dbManager = [[DBManager alloc] initWithDatabaseFilename:@"todotaskdb.sql"];
  </code></pre>
  
  <p>Can anyone please tell me what is it that I am doing wrong?</p>