Many of us have been finding problems in using java bean model importer in Web Dynpro.Each time we change something in command bean, we have to delete the entire model and import the model again.This weblog explains how we can add new model classes to, delete or change existing model classes from the imported java bean model. Create a new Model class in the Model Add modified command bean jar to the class path & to the lib folder of your Web Dynpro project. Create a new model class for the imported model with the same name and same package as provided in the command bean class. A model class in Web Dynpro contains properties and relations. Simple type variables in the command bean class are classfied as properties in the model class. Class type variables in the command bean class are classified as relations in the model class. For every simple type variable present in the command bean class, we have to add a new property to the model class with the same name & same type as in the command bean class. Create model relation for class type variable. In the same way you can add new model class properties & relations to existing model class.