In my project i have a component that gets data from the server and lists the
task details. I have the following AS code and MXMl code to display a combobox
for categories.

[Bindable]
private var taskCategories:ArrayCollection = new
ArrayCollection([{label:"Morning",category_id:1},{label:"Evening",c ategory_id:2}
]);



<mx:FormItem label="Category">
<mx:ComboBox height="23" width="162" id="task_category"
dataProvider="{taskCategories}"/>
</mx:FormItem>



Using Flex Debugger i found a warning

warning: unable to bind to property 'category_id' on class 'Object' (class is
not an IEventDispatcher)

Can anyone help on this issue. Thanks.

[Bindable]
private var taskCategories:ArrayCollection = new
ArrayCollection([{label:"Morning",category_id:1},{label:"Evening",c ategory_id:2}
]);



<mx:FormItem label="Category">
<mx:ComboBox height="23" width="162" id="task_category"
dataProvider="{taskCategories}"/>
</mx:FormItem>

The code you attached does not give me the warning in the debugger, but
depending on how you use it, like if you use the data elements in a binding
situation you might, because although the ArrayCollection uses binding, your
data elements do not.

If it is possible to provide a more complete, and yet still simplified, code
example displaying the issue, we might be able to give more hints.