Are you saying you get this error when you click a button?
On 3/27/10 1:49 PM, "[email protected]" <[email protected]> wrote: I'm converting an average size app to Flex 4 and right around the time I switched to the default spark theme (from the halo theme) I started getting errors on all of my buttons. TypeError: Error #1009: Cannot access a property or method of a null object reference. at mx.managers::FocusManager/childHideHandler()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\FocusManager.as:1744] at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/dispatchEvent()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:12266] at mx.core::UIComponent/setVisible()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:3038] at mx.core::UIComponent/set visible()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:2997] at mx.controls::Button/http://www.adobe.com/2006/flex/mx/internal::viewSkinForPhase()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\controls\Button.as:1953] at mx.controls::Button/http://www.adobe.com/2006/flex/mx/internal::viewSkin()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\controls\Button.as:1869] at mx.controls::Button/updateDisplayList()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\controls\Button.as:1754] at mx.core::UIComponent/validateDisplayList()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8531] at mx.managers::LayoutManager/validateDisplayList()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:663] at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:718] at mx.managers::LayoutManager/doPhasedInstantiationCallb It breaks on this line (the stage is null): -> DisplayObject(form).stage.focus = null; FocusManager.as: private function childHideHandler(event:Event):void { var target:DisplayObject = DisplayObject(event.target); // trace("FocusManager focusInHandler in = " + this._form.systemManager.loaderInfo.url); // trace("FM " + this + " focusInHandler " + target); if (lastFocus && !isEnabledAndVisible(DisplayObject(lastFocus))) { DisplayObject(form).stage.focus = null; lastFocus = null; } } -- Alex Harui Flex SDK Team Adobe System, Inc. http://blogs.adobe.com/aharui
