host_data directive in PGI 12.6

Hi all!

what does “TBD” mean refer to “!$acc host_data” at http://www.pgroup.com/resources/accel.htm#spec?

Attempts to compile simple program result in the following error message

PGF90-S-0155-A data clause for a variable appears within another region with a data clause for the same variable a

Program

PROGRAM main
INTEGER :: a(1024)
!$acc data copy(a)
! <Populate a(:) on device  as before>
!$acc host_data use_device(a)
CALL dbl_cuda(a)
!$acc end host_data
!$acc end data
END PROGRAM main

WBR,
Alexey