+ c = casereader_peek (group, 0);
+ if (c == NULL)
+ {
+ casereader_destroy (group);
+ return;
+ }
+ output_split_file_values (ds, c);
+ case_unref (c);
+
+ group = casereader_create_filter_weight (group, dataset_dict (ds),
+ NULL, NULL);
+
+ pass1 = group;
+ pass2 = dsc->max_moment <= MOMENT_MEAN ? NULL : casereader_clone (pass1);