I have the Fortran subroutines
subroutine sub_1() !$acc routine seq call sub_2() end subroutine sub_1
subroutine sub_2() !$acc routine seq end subroutine sub_2
but unfortunately I get the following compilation error
PGF90-S-0155-Procedures called in a compute region must have acc routine information: sub_2
It seems that I cannot call accelerated subroutines in sequence. Is this correct or I am missing something?