App crashes occassionally when closes windows: 1 window with multiple views (each have a table that drills down)

I have 4 views on a window that I am controlling with a tabbedbar on title. Each view has a table on it, that drills down to other tables. When I show one view I am hiding the 3 views. Occasionally when I close a window on the stack I get an error.

:   2014-03-03 10:40:48.316 Lab Values ++[23487:80b] nested push animation can result in corrupted navigation bar
[INFO] :   2014-03-03 10:40:48.670 Lab Values ++[23487:80b] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.
[ERROR] :  The application has crashed with an uncaught exception 'NSInvalidArgumentException'.
[ERROR] :  Reason:
[ERROR] :  Can't add self as subview
[ERROR] :  Stack trace:
[ERROR] :  0   CoreFoundation                      0x04eee5c8 __exceptionPreprocess + 152
[ERROR] :  1   libobjc.A.dylib                     0x049f88b6 objc_exception_throw + 44
[ERROR] :  2   CoreFoundation                      0x04eee3bb +[NSException raise:format:] + 139
[ERROR] :  3   UIKit                               0x017c4dfb -[UIView(Internal) _addSubview:positioned:relativeTo:] + 113
[ERROR] :  4   UIKit                               0x017b89b1 -[UIView(Hierarchy) addSubview:] + 56
[ERROR] :  5   UIKit                               0x01751766 __53-[_UINavigationParallaxTransition animateTransition:]_block_invoke + 1701
[ERROR] :  6   UIKit                               0x017bf3ef +[UIView(Animation) performWithoutAnimation:] + 82
[ERROR] :  7   UIKit                               0x01750c96 -[_UINavigationParallaxTransition animateTransition:] + 1155
[ERROR] :  8   UIKit                               0x0188be4e -[UINavigationController _startCustomTransition:] + 3446
[ERROR] :  9   UIKit                               0x018980c7 -[UINavigationController _startDeferredTransitionIfNeeded:] + 688
[ERROR] :  10  UIKit                               0x01898cb9 -[UINavigationController __viewWillLayoutSubviews] + 57
[ERROR] :  11  UIKit                               0x019d2181 -[UILayoutContainerView layoutSubviews] + 213
[ERROR] :  12  UIKit                               0x12dab56f -[UILayoutContainerViewAccessibility(SafeCategory) layoutSubviews] + 50
[ERROR] :  13  UIKit                               0x017c8267 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 355
[ERROR] :  14  libobjc.A.dylib                     0x04a0a81f -[NSObject performSelector:withObject:] + 70
[ERROR] :  15  QuartzCore                          0x02fc82ea -[CALayer layoutSublayers] + 148
[ERROR] :  16  QuartzCore                          0x02fbc0d4 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
[ERROR] :  17  QuartzCore                          0x02fbbf40 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26
[ERROR] :  18  QuartzCore                          0x02f23ae6 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 294
[ERROR] :  19  QuartzCore                          0x02f24e71 _ZN2CA11Transaction6commitEv + 393
[ERROR] :  20  QuartzCore                          0x02f25544 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 92
[ERROR] :  21  CoreFoundation                      0x04eb64ce __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
[ERROR] :  22  CoreFoundation                      0x04eb641f __CFRunLoopDoObservers + 399
[ERROR] :  23  CoreFoundation                      0x04e94344 __CFRunLoopRun + 1076
[ERROR] :  24  CoreFoundation                      0x04e93ac3 CFRunLoopRunSpecific + 467
[ERROR] :  25  CoreFoundation                      0x04e938db CFRunLoopRunInMode + 123
[ERROR] :  26  GraphicsServices                    0x051489e2 GSEventRunModal + 192
[ERROR] :  27  GraphicsServices                    0x05148809 GSEventRun + 104
[ERROR] :  28  UIKit                               0x0175dd3b UIApplicationMain + 1225
[ERROR] :  29  Lab Values ++                       0x00005868 main + 456
[ERROR] :  30  libdyld.dylib                       0x05ada70d start + 1
[ERROR] :  2014-03-03 10:40:51.284 Lab Values ++[23487:80b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't add self as subview'
[ERROR]

function Window1(title) {
    var myFontName = Ti.App.Properties.getString('fnts');
    var myFontSize = Ti.App.Properties.getInt('fntSize');
 
    var $$ = require("ui/handheld/styles");
    var win = Ti.UI.createWindow($$.window1);
    //win.navbarHidden = true;
    win.layout = 'vertical';
    win.fullscreen = false;
 
    var buttonObjects = [{
        image : 'images/img/panw.png',
        width : 45 + "dp"
    }, {
        image : 'images/img/seabw.png',
        width : 45 + "dp"
    }, {
        image : 'images/img/bodw.png',
        width : 45 + "dp"
    }, {
        image : 'images/img/prow.png',
        width : 45 + "dp"
    }];
 
    var tb4 = Ti.UI.iOS.createTabbedBar({
        labels : buttonObjects,
        backgroundColor : 'white',
        style : Titanium.UI.iPhone.SystemButtonStyle.BAR,
        height : 30 + "dp",
        width : 180 + "dp"
    });
    win.titleControl = tb4;
    // win.add(tb4);
 
    tb4.index = 1;
 
    var rBtn2 = Ti.UI.createButton({
        backgroundImage : 'images/image/clip@2x.png',
        height : 20 + "dp",
        width : 20 + "dp"
 
    });
 
    win.setRightNavButton(rBtn2);
 
    rBtn2.addEventListener('click', function(_e) {
        var DetailWindow = require('ui/common/main/favs1');
 
        win.containingTab.open(new DetailWindow());
 
    });
    var sea = Ti.UI.createView($$.vw);
    var sys = Ti.UI.createView($$.vw);
    var pan = Ti.UI.createView($$.vw);
    var pro = Ti.UI.createView($$.vw);
 
    function winSea() {
 
    }
 
    winSea();
 
    function winSys() {
 
 
    }
 
    winSys();
 
    function winPan() {
 
    }
 
    winPan();
 
    function winPro() {
 
    }
 
    winPro();
 
    var container = Ti.UI.createView($$.vw);
 
    win.add(container);
 
    container.add(pro);
    container.add(pan);
    container.add(sys);
    container.add(sea);
 
    tb4.addEventListener('click', function(e) {
        switch(e.index) {
            case 0:
                pan.show();
                sys.hide();
                sea.hide();
                pro.hide();
                buttonObjects[0].image = 'images/img/panb.png';
                buttonObjects[1].image = 'images/img/seaww.png';
                buttonObjects[2].image = 'images/img/bodw.png';
                buttonObjects[3].image = 'images/img/bodw.png';
                tb4.labels = buttonObjects;
                break;
 
            case 1:
                pan.hide();
                sys.hide();
                sea.show();
                pro.hide();
                buttonObjects[0].image = 'images/img/panw.png';
                buttonObjects[1].image = 'images/img/seabw.png';
                buttonObjects[2].image = 'images/img/bodw.png';
                buttonObjects[3].image = 'images/img/bodw.png';
                tb4.labels = buttonObjects;
                break;
 
            case 2:
                pan.hide();
                sys.show();
                sea.hide();
                pro.hide();
                buttonObjects[0].image = 'images/img/panw.png';
                buttonObjects[1].image = 'images/img/seaww.png';
                buttonObjects[2].image = 'images/img/bodb.png';
                buttonObjects[3].image = 'images/img/bodw.png';
                tb4.labels = buttonObjects;
                break;
 
            case 3:
                pan.hide();
                sys.hide();
                sea.hide();
                pro.show();
                buttonObjects[0].image = 'images/img/panw.png';
                buttonObjects[1].image = 'images/img/seaww.png';
                buttonObjects[2].image = 'images/img/bodb.png';
                buttonObjects[3].image = 'images/img/bodw.png';
                tb4.labels = buttonObjects;
                break;
        }
    });
 
    return win;
}
 
module.exports = Window1;