------- Comment #1 from tobias dot burnus at physik dot fu-berlin dot de 2007-07-06 13:50 ------- I think this is invalid.
The normative words are, from 9.6.1.11 "The scalar-default-char-variable in the FORMATTED= specifier is assigned the value YES if FORMATTED is included in the set of allowed forms for the file, NO is FORMATTED is not included in the set of allowed forms for the file, and UNKNOWN if the processor is unable to determine whether or not FORMATTED is included in the set of allowed forms for the file." gfortran/g95: yes, yes openf95/ifort: no, yes NAG f95: unknown, yes I think NAG's answer is most correct: It formatted=Yes as it seemingly works (the file is open) while one does not know whether it can be opened as unformatted. ifort/openf95 simply assume it cannot be whereas g95/gfortran assume that one can do so. If the file is empty the answer YES is correct. If the file is not empty, reading a formatted file as unformatted will probably not work, but still it may work. I personally regard this part of the inquiry function as useless. See also: http://groups.google.com/group/comp.lang.fortran/browse_thread/thread/30719cf69f699d34 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32646
