In this case, I introduced an error to the code generation handling a collection, adding an extra item to the stack in the body of the item unmarshalling loop.

You will need to go to the properties of this item before launching it though as the default port will still be there and therefore you will get a "Page cannot be displayed" error message.

If you create a repository or a business item using one of the unsupported data types, an error will appear in the error view.