Diagnosis
When editing the attributes of a table control, you chose theAttributes function.
However, the cursor is not on a field for which field attributes can bedisplayed or edited.

System Response
The system can only execute the function if the cursor is on the fieldname field for the title or the line selection column of the tablecontrols, and the title and/or line selection field already exist(s) orcan be created.
If you are in change mode, the title field and/or the line selectionfield can only be created if the attribute "With title" and/or "Withselection column" is (are) set und the appropriate field name field isconsequently ready for input.

Procedure
Place the cursor on a valid field or set the attribute accordingly,choose Refresh and then repeat Attributes.