Instead of using creationComplete, you might want to wait until you get a resultEvent from the server.
On 3/29/10 1:12 PM, "Scott" <[email protected]> wrote: It’s throwing because the cbGroupSelect.selectedItem.pkGroupID doesn’t exist when it’s trying to call it the list_update function… The combobox cbGroupSelect pulls its data from the provider first which gives the index fields for the list object. I’m doing creation_complete on the list object, but the object is created before the data provider for the combobox has filled its data. Here’s the dump: TypeError: Error #1009: Cannot access a property or method of a null object reference. at Config/list_creationCompleteHandler()[X:\PackRat\www\src\Config.mxml:25] at Config/__lstItemList_creationComplete()[X:\PackRat\www\src\Config.mxml:98] at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/dispatchEvent()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\core\UIComponent.as:11749] at mx.core::UIComponent/set initialized()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\core\UIComponent.as:1525] at mx.managers::LayoutManager/validateClient()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\managers\LayoutManager.as:988] at mx.core::UIComponent/validateNow()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\core\UIComponent.as:7249] at mx.core::UIComponent/creationCompleteHandler()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\core\UIComponent.as:10846] at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/dispatchEvent()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\core\UIComponent.as:11749] at mx.core::UIComponent/set initialized()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\core\UIComponent.as:1525] at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\managers\LayoutManager.as:759] at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1069] ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Alex Harui Sent: Monday, March 29, 2010 2:47 PM To: [email protected] Subject: Re: [flexcoders] Dataprovider and events Post the entire stacktrace so we can see why it throws. On 3/29/10 11:33 AM, "Scott" <[email protected]> wrote: I know I've ran into this before but for some reason my memory isn't kicking in. I've got a listbox that depends on a combobox to load before it fires its dataprovider. Without having the combobox loaded, the data provider for the listbox is null and it throws an error: #1009: Cannot access a property or method of a null object reference. I know why it's happening but I can't seem to figure out a workaround... Any ideas? -- Alex Harui Flex SDK Team Adobe System, Inc. http://blogs.adobe.com/aharui
