I want to create a Maple symbol consisting of a subliteral with a right arrow over it. If I create the subliteral with the third entry in the Layout Pallette and then use the second entry in the Accents palette to add the RightOverArrow, then I get the message "Error, invalid overscript". Example: Subliteral from Layout Palette, type "V", tab, type "x", Highlight the entire entry and select RightOverArrow from Accents palette, type