http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60781
--- Comment #5 from Laura C <lauraelcomeau at yahoo dot co.uk> --- Yes, I type ./JIM_exe<namelist.txt to run the executable. The executable appears to read the files under the 'grids' section of the namelist successfully, but produces this error when reading the met_file under the 'drive' section. The filename is correct and the met_file exists (a different error is produced if the file is missing or the name is incorrect). I can attach the executable if that helps?