Diagnosis
You selected a group of screen elements that you want to define as aradio button group. However, there is only one radio button. A radiobutton group must consist of at least two radio buttons, since they areintended to allow users to chose between alternatives.

System Response
The radio button group cannot be defined.

Procedure
Redefine the group so that it contains at least two radio buttons. Youmay first need to create a new radio button.