It is assumed to use Java 8 in the manual.Please try "Environment> Server> Java version" as "1.8".
Let's create a code to display the message when Wagby newly creates a "group" model (jgroup) that is provided as standard.
First build the application and start it.(The content of design information is not concerned.)
With the application launched, from the Designer, the system model "group"Choose.It is bundled with Wagby as standard.
Open "Screen> Script".Enter as follows.
Log on to the application with an account with administrator privileges.Execute "New group registration" from the management processing menu.
At the timing of registration processing, confirm that the message is displayed on the console that started the application (Tomcat).