Hi. Are you still having problems with this? How are you loading your modules?
There are some things you need to be aware of when loading LCDS applications as sub apps into a parent application.
In most cases you will want to use SWFLoader instead of ModuleLoader. When using SWFLoader you need to set the loadForCompatibility property to true. You will also need to use the new 10.1 Flash player. If you need to support older versions of the player, there are a couple of workarounds that are possible.
I describe these in more detail in my comments to the following bug.
Take a look at my comments and see if that helps you. If that doesn't solve your problem let me know by replying to this forum posting. Thanks.
There is also some documentation based on info from Alex Glosband:
@Alex excellent workaround. Just one question, when using SWFLoader, how can you get an object/method from the parent (main) application. In module I can use parentApplication.methodName, but it does not work if SWFLoader. Any ideas?
I had the same error (but only with a single module loaded). It turned out I forgot to add the identity property in my destination.
Hope it helps