[J3] C_PTR not allowed in SEQUENCE types?

[Bader, Reinhold]

Hi Bill, 

> On a related issue, I'm not really sure why SEQUENCE is not already in the list of Obsolescent features. 

I had a discussion on this recently with Rolf Rabenseifner (from the MPI Forum). Sequence types feature prominently in the 
type API of MPI for the Fortran interface, because the memory layout is not sufficiently specified for non-SEQUENCE / non-BIND(C) types. 

I would assume quite some MPI codes use this, and it would be a significant imposition if SEQUENCE were on the way to be 
removed. 

Cheers
Reinhold