def METHOD_NAME(msg = None):
    if msg is not None:
        error_write("Error: " + msg + "\n")
    backend_descr = "\n".join([ "    %-15s %s" % (n, d)
                                for n,d in tracetool.backend.get_list() ])
    format_descr = "\n".join([ "    %-15s %s" % (n, d)
                               for n,d in tracetool.format.get_list() ])
    error_write("""\