Paul,
Are you trying to edit typedefs created in 8.2 with 7.1? I'm a little confused as to what you're trying to accomplish and why you're moving between the versions like that... If you saved the typdef (or any other VI for that matter) from 8.2, then you won't be able to edit it in 7.1 any more.
--Paul Mandeltort
Automotive and Industrial Communications Product Marketing