Diagnosis
The group of screen elements with which you want to define a radiobutton group contains elements that are not radio buttons. Since theelements of a radio button group belong together logically, the groupcan only consist of radio buttons.

System Response
The radio button group cannot be defined.

Procedure
Define the selection so that it only contains radio buttons. Ifnecessary, deselect any elements that fall within the selection byholding down the Ctrl or Alt key and single-clicking them.