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Hi,
It seems that the decomp_info_init subroutine in decomp_2d.F90 file has some problems, particularly at the block #ifdef USE_CUDA starting at line 716.
The calls to c_f_pointer leads to a compilation error in pgi-18.10 with the error:

PGF90-S-0550-Allocatable device array is not in c_f_pointer with -Mallocatable=03 - work1_r_d. (decomp_2d.F90: 733)
PGF90-S-0550-Allocatable device array is not in c_f_pointer with -Mallocatable=03 - work2_r_d. (decomp_2d.F90: 735)

By using pgi-16.5, however, the code is compiled successfully, but it fails to run when it reaches line 733 - the first call to c_f_pointer.

Moreover, the definitions of cptr1 and cptr2 are not consistent.

Would you please take a look at these?

Many thanks.
Ali