new types

["Bob McChesney" <bob@teambob.freeserve.co.uk>]

Could anyone please help me? I'm trying to make a new type of an access
type. Is that possible?

eg.
you know you can do:
    type BobType is new Integer

but can you do:
    type BobType is new Set_Class.Set
where Set is:
    type Set access Set_Header
?????

I've tried to do this and I get the error 'invalid prefix in selected
component "Set_Class" '

I don't know if it matters but Set_Class is generic.

Thanks,
Bob McChesney