int32 compress P; /* 48: 1=compressed, 0=not compressed. */
int32 weight_idx P; /* 4c: 1-based index of weighting var, or 0. */
int32 case_cnt P; /* 50: Number of cases, -1 if unknown. */
int32 compress P; /* 48: 1=compressed, 0=not compressed. */
int32 weight_idx P; /* 4c: 1-based index of weighting var, or 0. */
int32 case_cnt P; /* 50: Number of cases, -1 if unknown. */