ar_vers
error->re_vers.low = msg->acpted_rply.ar_vers.low;
error->re_vers.high = msg->acpted_rply.ar_vers.high;
if (!xdr_u_int32_t(xdrs, &(ar->ar_vers.low)))
return (xdr_u_int32_t(xdrs, &(ar->ar_vers.high)));
rply.acpted_rply.ar_vers.low = low_vers;
rply.acpted_rply.ar_vers.high = high_vers;