Could not load NIB in bundle: 'NSBundle' in ios?

Hi, I have a view that contains a tableview in my app. I use cellForRowAtIndexPath function to populate tableview. But it crashes sometimes and throws an error like below. It occurs rarely but I want to solve it!

Code part :

(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
    {

        if (self.productViewType == ProductToShelfViewTypeShelf) {

            static NSString* cellIdentifier = @"ShelfCell";
            ShelfCellView* cell = (ShelfCellView*)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
            if (cell == nil) {
                NSArray* nibObjects = [[NSBundle mainBundle] loadNibNamed:@"ShelfCellView" owner:nil options:nil];
                for (id currentObject in nibObjects) {
                    if ([currentObject isKindOfClass:[ShelfCellView class]]) {
                        cell = (ShelfCellView*)currentObject;
                    }
                }
                [cell initViewStyles];
            }

            Shelf* shelf = [self.shelfList objectAtIndex:indexPath.row];
            cell.shelf = shelf;
            [cell initView];
            return cell;
        }
        else {
            static NSString* cellIdentifier = @"ProductToShelfCell";
            ProductToShelfCellView* cell = (ProductToShelfCellView*)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
            if (cell == nil) {
                NSArray* nibObjects = [[NSBundle mainBundle] loadNibNamed:@"ProductToShelfCellView" owner:nil options:nil];
                for (id currentObject in nibObjects) {
                    if ([currentObject isKindOfClass:[ProductToShelfCellView class]]) {
                        cell = (ProductToShelfCellView*)currentObject;
                    }
                }
                [cell initViewStyles];
            }
            Product* product = [self.products objectAtIndex:indexPath.row];
            cell.product = product;
            [cell initView];
            return cell;
        }

        return nil;
    }

Stacktrace :

   Could not load NIB in bundle: 'NSBundle </var/containers/Bundle/Application/B07CBD90-32C2-4F41-ADB0-11AA6422AFF3/Myapp.app> (loaded)' with name 'ProductToShelfCellView'
        Fatal Exception: NSInternalInconsistencyException
        0  CoreFoundation                 0x1f576e07 __exceptionPreprocess
        1  libobjc.A.dylib                0x1e7d7077 objc_exception_throw
        2  CoreFoundation                 0x1f576d4d -[NSException initWithCoder:]
        3  UIKit                          0x24aa5007 -[UINib instantiateWithOwner:options:]
        4  UIKit                          0x24aa726b -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:]
        5  Kitapyurdu                     0x50321 -[ProductToShelfViewController tableView:cellForRowAtIndexPath:] (ProductToShelfViewController.m:429)
        6  UIKit                          0x249027fb -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:]
        7  UIKit                          0x249029e5 -[UITableView _createPreparedCellForGlobalRow:willDisplay:]
        8  UIKit                          0x248ef1ef -[UITableView _updateVisibleCellsNow:isRecursive:]
        9  UIKit                          0x24907ae1 -[UITableView _performWithCachedTraitCollection:]
        10 UIKit                          0x246ad345 -[UITableView layoutSubviews]
        11 UIKit                          0x245c65d5 -[UIView(CALayerDelegate) layoutSublayersOfLayer:]
        12 QuartzCore                     0x223ec109 -[CALayer layoutSublayers]
        13 QuartzCore                     0x223e031f CA::Layer::layout_if_needed(CA::Transaction*)
        14 QuartzCore                     0x223e01af CA::Layer::layout_and_display_if_needed(CA::Transaction*)
        15 QuartzCore                     0x22370a6b CA::Context::commit_transaction(CA::Transaction*)
        16 QuartzCore                     0x2238f035 CA::Transaction::commit()
        17 UIKit                          0x2484891f _UIApplicationFlushRunLoopCATransactionIfTooLate
        18 UIKit                          0x24d6388f __handleEventQueue
        19 CoreFoundation                 0x1f532c8b __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
        20 CoreFoundation                 0x1f532795 __CFRunLoopDoSources0
        21 CoreFoundation                 0x1f530a6b __CFRunLoopRun
        22 CoreFoundation                 0x1f480073 CFRunLoopRunSpecific
        23 CoreFoundation                 0x1f47fe81 CFRunLoopRunInMode
        24 GraphicsServices               0x20c2cbfd GSEventRunModal
        25 UIKit                          0x2463482f -[UIApplication _run]
        26 UIKit                          0x2462ef61 UIApplicationMain
        27 Kitapyurdu                     0x222fb main (main.m:16)
        28 libdispatch.dylib              0x1ec4a50b (Missing)