+#ifdef _USE_KNETFILE
+ save_zindex(rz, rz->x.fpw);
+ if(is_big_endian()){
+ write(rz->x.fpw, &rz->in, sizeof(int64_t));
+ write(rz->x.fpw, &rz->out, sizeof(int64_t));
+ } else {
+ uint64_t v64 = byte_swap_8((uint64_t)rz->in);
+ write(rz->x.fpw, &v64, sizeof(int64_t));
+ v64 = byte_swap_8((uint64_t)rz->out);
+ write(rz->x.fpw, &v64, sizeof(int64_t));
+ }
+#else