Diagnosis
In the "Icon name" field, you specified either a text which the systemcannot interpret or an icon name which is not allowed for the screenelement type used.

System Response
Not all icons can be used everywhere on the screen. For example, youcan use only a restricted set of icons on pushbuttons. The systemrejects invalid or unknown icons.

Procedure
By pressing F4 when on the "Icon name" field, you can get a completelist of all icons that are allowed for the screen field type used. Fromthis list, you can choose an icon.