ScalarMap cannot belong to two Displays

["John J Brecht" <john.brecht@xxxxxxx>]

When I switch a cell in the SpreadSheet from to 2D I get the
DisplayException: "ScalarMap cannot belong to two Displays."  why is
that?

-john

--
John Brecht                                     Software Engineer
650-859-2325(voice)  Center for Technology in Learning, SRI Int'l
650-859-3673(fax)                           333 Ravenswood Avenue
john.brecht@xxxxxxx                         Menlo Park, CA  94025