I bought the last book of Holger and try to do the stuff step by step. By Design with a TAureliusDataset i load the .bpl compiled (which contains entity classes) and then i select TCustomer class to load its fields i get a clear error :
The message indicates the problem is in class TDocument.
You can see there is a warning in such class, because the Automapping attribute is misspelled as Automaping: