https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77903
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > That link worked for me. Thanks For me too. I think the reference C1556 (R1527) is rather C1255 (R1227) If MODULE appears in the prefix of a module subprogram, the subprogram shall specify the same characteristics and dummy argument names as its corresponding module procedure interface body. I overlooked it my F2015 draft.