What is the problems in this transition?? The error is Flex cannot resolve the fromState attribute.
<s:transitions>
<s:Transition fromState="Viewer" toState="Editor">
<s:Fade target="{viewerProductDetail}" duration="1000"/>
</s:Transition>
<s:Transition formState="Editor" toState="Viewer">
<s:Fade target="{editorProductDetail}" duration="1000"/>
</s:Transition>
</s:transitions>
The second transition specifies “formState” not “fromState”. Are you sure you’re reading the error correctly?