Dear all, i have facing the following error when using Tabbar to switch between the page. The error is like that,
TypeError: Error #1009: Cannot access a property or method of a null object reference. at mx.core::Container$/http://www.adobe.com/2006/flex/mx/internal::checkFocus()[C:\dev\flex_201_gmc\sdk\frameworks\mx\core\Container.as:462] at mx.core::UIComponent/focusInHandler()[E:\dev\flex_201_borneo\sdk\frameworks\mx\core\UIComponent.as:8063] at flash.display::Stage/set focus() at mx.core::UIComponent/setFocus()[E:\dev\flex_201_borneo\sdk\frameworks\mx\core\UIComponent.as:6284] at mx.managers::FocusManager/setFocus()[C:\dev\flex_201_gmc\sdk\frameworks\mx\managers\FocusManager.as:390] at mx.managers::FocusManager/mouseDownHandler()[C:\dev\flex_201_gmc\sdk\frameworks\mx\managers\FocusManager.as:1350] I have use the Debug to trace and find that sometime the IFocusManager is null so that the error is prompt . And it is very interesting that not all the computer will have this problem . What i can do? thx capho