iOS Question Moved from 2.5 to 4.0 app which works; not fails

Line 185: Page1.RootPanel.LoadLayout("Page1")
run in debug(other wise just fails out on app run

Application_Start
Error occurred on line: 185 (Main)
Expected: UIButton, object type: UILabel
Stack Trace: (
CoreFoundation <redacted> + 152
libobjc.A.dylib objc_exception_throw + 38
CoreFoundation <redacted> + 0
AstroMatch_Voice -[B4IObjectWrapper setObject:] + 364
AstroMatch_Voice -[B4ILayoutBuilder loadLayoutHelper:::::::::::] + 3570
AstroMatch_Voice -[B4ILayoutBuilder loadLayoutHelper:::::::::::] + 5100
AstroMatch_Voice -[B4ILayoutBuilder loadLayout:::] + 2348
AstroMatch_Voice -[B4IPanelWrapper LoadLayout::] + 148
AstroMatch_Voice -[b4i_main _application_start:] + 2114
CoreFoundation <redacted> + 68
CoreFoundation <redacted> + 300
AstroMatch_Voice +[B4I runDynamicMethod:method:throwErrorIfMissing:args:] + 1784
AstroMatch_Voice -[B4IShell runMethod:] + 590
AstroMatch_Voice -[B4IShell raiseEventImpl:method:args::] + 2238
AstroMatch_Voice -[B4IShellBI raiseEvent:eventarams:] + 1578
AstroMatch_Voice __33-[B4I raiseUIEvent:eventarams:]_block_invoke + 74
libdispatch.dylib <redacted> + 10
libdispatch.dylib <redacted> + 22
libdispatch.dylib _dispatch_main_queue_callback_4CF + 902
CoreFoundation <redacted> + 8
CoreFoundation <redacted> + 848
CoreFoundation CFRunLoopRunSpecific + 470
CoreFoundation CFRunLoopRunInMode + 104
GraphicsServices GSEventRunModal + 80
UIKit UIApplicationMain + 150
AstroMatch_Voice main + 106
libdyld.dylib <redacted> + 2
)
Application_Active