Actionscript Error: declaration must be contained within the <Declarations> tag, since it is not ass

 Issue:

When you edit a actionscript, you may got following error.

 

Error:

<span style="color:#000099;"></span><pre class="java" name="code">declaration must be contained within the <Declarations> tag, since it is not assignable to the default property’s element type ‘mx.core.IVisualElement’.

Solution:

Please check if there is a typing mistaken in your code. Especially for a extra or unecessary letter.