DropDownList Skin Not Found error

Question

I am running Flex 4.6 and the latest install of Flash Builder from the creative.adobe.com subscription.
I have a DropDownList that is running in two places, one on a VGroup page and again on a TitleWindow popup. The VGroup displays a list of items to edit, and the TitleWindow displays a form with the item the user selected to edit.
The VGroup page displays the DropDownList fine, however when I launch the TitleWindow in a popup (using PopUpManager), I am getting an error thrown that says the component's skin cannot be found:
Error: Skin for IMEIAddEdit531.PanelSkin534._PanelSkin_Group1.contents.contentGroup.Form542.LocalizedForm Item543.FormItemSkin544.contentGroup.cbProviders cannot be found.
          at spark.components.supportClasses::SkinnableComponent/attachSkin()[E:\dev\4.y\frameworks\pr ojects\spark\src\spark\components\supportClasses\SkinnableComponent.as:698]
          at spark.components.supportClasses::SkinnableComponent/validateSkinChange()[E:\dev\4.y\frame works\projects\spark\src\spark\components\supportClasses\SkinnableComponent.as:443]
          at spark.components.supportClasses::SkinnableComponent/createChildren()[E:\dev\4.y\framework s\projects\spark\src\spark\components\supportClasses\SkinnableComponent.as:406]
          at mx.core::UIComponent/initialize()[E:\dev\4.y\frameworks\projects\framework\src\mx\core\UI Component.as:7634]
The error is thrown in the SkinnableComponent.as file on line 698, as the skin of this DropDownList seems to return null after all of the code attempts to find one.
I am not doing anything with custom skins, and have in fact tried the form with a generic DropDownList with the same result. I have a version of this same application running in Flex 3, and am re-writing from near zero the app in 4.6. I have seen something that looks related, but can't tell (http://mail-archives.apache.org/mod_mbox/incubator-flex-dev/201210.mbox/%3C546131470.53222 .1350418984281.JavaMail.jiratomcat@arcas%3E).
Any ideas would greatly be appreciated!
Cheers,
Fred
Message was edited by: FredMBarrett  After another search, I found this post be member zolotoj on thread http://forums.adobe.com/thread/774223 (see below). When I implemented the fix on my combo box, it started working, however now the next item on the TitleWindow form which is a generic CheckBox is now throwing the same error!  This seems like a serious bug, unless I now have to create overridden versions of all the Flex controls that have their skins forced in place?!   3. Zolotoj, Jan 6, 2011 12:42 PM   in reply to Flex harUI Report Actually, after adding the following code it started working:   import spark.skins.spark.DropDownListSkin;   override public function stylesInitialized():void  {       super.stylesInitialized();       this.setStyle("skinClass", DropDownListSkin); }
Message was edited by: FredMBarrett
Found solution at http://stackoverflow.com/questions/3361060/skins-not-loaded-in-sub-applications-in-flex. Answer is compiler setting "-keep-all-type-selectors". Who knew...

Answer 1

Yes, everything was rendered. I'm not sure what you mean by the audio mixed down, so I'm going to say no. I have a bunch of audio tracks and have never done anything special with them before.
As to the software comment...I was planning on updating after this project was completed. I don't feel the need to rush out and get new (expensive) software, and I didn't want to switch until this was done.
I also just tried exporting a few small sections separately--just video, video with png, video with text, video with Boris, etc. and everything exported with an error. But obviously need to export the whole thing together!