The VP-UML Enterprise Edition version 4.1 on windows manual states that to generate hibernate code you should select the Tools->Hibernate menu. This menu choice does not exist.
How does one go about generating Hibernate code from a class diagram?
The manual that you are using maybe outdated. You can generate the Object-Relational mapping (ORM) source code by select Tools -> ORM -> Wizards. The documentation for the ORM features is currently not available on the VP-UML user’s guide. Please refer to the DB Visual Architect (DB-VA) user’s guide for more information.