ROUTINE
-------

INT_ ug_write_arg_file (int argc,
                        char *argv[],
                        char Arg_File_Name[])

DESCRIPTION
-----------

Write an input argument file.

INPUT ARGUMENTS
---------------

argc              : Argument count.
argv              : Pointer to argument vector.
Arg_File_Name     : Character string with argument file name.


RETURN VALUE
------------

0                 : Arguments were written successfully.
>400              : An error occurred writing the input argument file.
