Can you paste the relevant code (Component#description) ... the fields, getters and setters ?
On Tue, 14 Feb 2017 at 14:00 L Eder <[email protected]> wrote: Hello isis users: I tried to create my first domain object, called Component, using the file templates. I created a package under the dom module, and created the files Component. java, ComponentMenu.java, and ComponentRepository.java. I then ran the project, without build errors. However, opening the browser at http://localhost:8080/wicket/ i got this: Error “The application failed to start due to a number of metamodel validation errors. domainapp.dom.PPB.Component#description: incompatible default handling of required/optional properties between Isis and JDO; add @javax.jdo.annotations.Column(allowsNull="...")” Source: web browser Any help is appreciated, thanks
