Modules not always loading at runtime

Question

I have a problem at run-time getting the various modules to
load. Sometimes they do and sometimes I get the following message:
VerifyError: Error #1014: Class mx.modules::Module not found.
    at flash.display::MovieClip/nextFrame()
    at mx.core::FlexModuleFactory/deferredNextFrame()[E:\dev\3.0.x\frameworks\projects\framework \src\mx\core\FlexModuleFactory.as:460]
    at mx.core::FlexModuleFactory/update()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\cor e\FlexModuleFactory.as:293]
    at mx.core::FlexModuleFactory/moduleCompleteHandler()[E:\dev\3.0.x\frameworks\projects\frame work\src\mx\core\FlexModuleFactory.as:526]
If I then recompile the various components sometimes the message will go away and the
module will load or sometimes I have to re-compile all of the components in reverse
order normal order etc. and after 3-4 attempts all of the modules will then load at
run time.
Any idea what this could be?
Scott

Answer 1

Version is 3.0 (build 3.0.194161)
There is a main application which loads various modules based
on the user's menu choices.
Here's a piece of the menu control:
menuitem label="Datenbank" type="radio"
                        groupName="one" data="RecipeSearchDB"/>
and the menu handler function:
private function menuHandler(event:MenuEvent):void  { 
    if (event.item.@data != "top") {
        //Alert.show("Label: " + event.item.@label + "\n" + "Data: " + event.item.@data, "Clicked menu item");
        if (event.item.@data == "RecipeCreate") {
            //Alert.show("Let's create a new recipe...")
            TargetModule.url = "Recipes.swf";
        else if (event.item.@data == "RecipeSearchDB") {     
            TargetModule.url = "";  
            TargetModule.url = "RecipeQryInput.swf";               
        else if (event.item.@data == "MPCreate") {     
            TargetModule.url = "";  
            TargetModule.url = "MealPlan.swf";               
        else {
            TargetModule.url = "";